Helge Weman
Om
Mitt forskningsområde; Nanofotoniske Materialer og Komponenter
I 2005 ble jeg utnevnt til professor i nanofotonikk som en del av NTNUs strategiske satsning på nanoteknologi. På Instituttet for Elektroniske Systemer leder jeg nå en forskningsgruppe som lager og karakteriserer nano-skala halvleder materialer og komponenter som for eksempel nanotråds-baserte solceller, lysdioder og lasere. Siden 2015 fokuserer vi mest på ultrafiolette (UV) lysdioder basert på GaN/AlGaN nanotråder vokst på grafén-substrat.
I 2010 oppdaget og patenterte jeg groing av halvleder nanotråder på grafén som opprinnelig ble vist for GaAs nanotråder. Dette er beskrevet skjematisk i denne YouTube-videon https://www.youtube.com/watch?v=3wLOXHRVVwQ
Jeg er oppfinner eller medoppfinner av 14 patentfamilier med over 100 patenter innvilget over hele verden.
Jeg er gründer og vitenskapelig leder (CSO) i CrayoNano AS http://crayonano.com, stiftet i 2012, som nå utvikler bakteriedrepende UV LED basert på halvleder nanotråder på grafén for bruk i vann-, luft- og overflate- desinfeksjonsapplikasjoner.
Jeg er innvalgt medlem av Norges Tekniske Vitenskapsakademi (NTVA) siden 2010.
Publikasjoner
2024
-
Ren, Dingding;
Nilsen, Tron Arne;
Nilsen, Julie Stene;
Ahtapodov, Lyubomir;
Mukherjee, Anjan;
Li, Yang.
(2024)
Quasi van der Waals Epitaxial Growth of GaAsSb Nanowires on Graphitic Substrate for Photonic Applications.
ACS Applied Nano Materials
Vitenskapelig artikkel
2023
-
Mosberg, Aleksander Buseth;
Ren, Dingding;
Ahtapodov, Lyubomir;
Weman, Helge;
Fimland, Bjørn Ove Myking;
Van Helvoort, Antonius.
(2023)
Focused ion beam lithography for position-controlled nanowire growth.
Nanotechnology
Vitenskapelig artikkel
-
Mukherjee, Anjan;
Ren, Dingding;
Mosberg, Aleksander Buseth;
Vullum, Per Erik;
Van Helvoort, Antonius;
Fimland, Bjørn Ove Myking.
(2023)
Origin of Leakage Currents and Nanowire-to-Nanowire Inhomogeneity in Radial p-i-n Junction GaAs Nanowire Array Solar Cells on Si.
ACS Applied Nano Materials
Vitenskapelig artikkel
2021
-
Liudi Mulyo, Andreas;
Mukherjee, Anjan;
Høiaas, Ida Marie;
Ahtapodov, Lyubomir;
Nilsen, Tron Arne;
Toftevaag, Håvard Hem.
(2021)
Graphene-Based Transparent Conducting Substrates for GaN/AlGaN Nanocolumn Flip-Chip Ultraviolet Light-Emitting Diodes.
ACS Applied Nano Materials
Vitenskapelig artikkel
-
Mukherjee, Anjan;
Ren, Dingding;
Vullum, Per Erik;
Huh, Junghwan;
Fimland, Bjørn-Ove;
Weman, Helge.
(2021)
GaAs/AlGaAs Nanowire Array Solar Cell Grown on Si with Ultrahigh Power-per-Weight Ratio.
ACS Photonics
Vitenskapelig artikkel
-
Liudi Mulyo, Andreas;
Fimland, Bjørn-Ove;
Weman, Helge.
(2021)
Molecular Beam Epitaxy of GaN/AlGaN Nanocolumns on Graphene: for Potential Application in Ultraviolet Light-Emitting Diodes.
Doctoral theses at NTNU (217)
Doktorgradsavhandling
2020
-
Liudi Mulyo, Andreas;
Rajpalke, Mohana;
Vullum, Per Erik;
Weman, Helge;
Kishino, Katsumi;
Fimland, Bjørn-Ove.
(2020)
The influence of AlN buffer layer on the growth of self-assembled GaN nanocolumns on graphene.
Scientific Reports
Vitenskapelig artikkel
2019
-
Høiaas, Ida Marie;
Liudi Mulyo, Andreas;
Vullum, Per Erik;
Kim, Dong Chul;
Ahtapodov, Lyubomir;
Fimland, Bjørn-Ove.
(2019)
GaN/AlGaN nanocolumn ultraviolet light-emitting diode using double-Layer graphene as substrate and transparent electrode.
Nano Letters
Vitenskapelig artikkel
-
Liudi Mulyo, Andreas;
Rajpalke, Mohana;
Kuroe, Haruhiko;
Vullum, Per Erik;
Weman, Helge;
Fimland, Bjørn-Ove.
(2019)
Erratum: Vertical GaN nanocolumns grown on graphene intermediated with a thin AlN buffer layer (Nanotechnology 30 015604).
Nanotechnology
Errata
-
Ren, Dingding;
Ahtapodov, Lyubomir;
Van Helvoort, Antonius;
Weman, Helge;
Fimland, Bjørn-Ove.
(2019)
Epitaxially grown III-arsenide-antimonide nanowires for optoelectronic applications.
Nanotechnology
Vitenskapelig artikkel
-
Wang, Yunyu;
Dheeraj, Dasa;
Liu, Zhiqiang;
Liang, Meng;
Li, Yang;
Yi, Xiaoyan.
(2019)
AlGaN Nanowires Grown on SiO2/Si (100) Using Graphene as a Buffer Layer.
Crystal Growth & Design
Vitenskapelig artikkel
-
Mukherjee, Anjan;
Yun, Hoyeol;
Shin, Dong Hoon;
Nam, Jungtae;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj.
(2019)
Single GaAs Nanowire/Graphene Hybrid Devices Fabricated by a Position-Controlled Microtransfer and an Imprinting Technique for an Embedded Structure.
ACS Applied Materials & Interfaces
Vitenskapelig artikkel
2018
-
Liudi Mulyo, Andreas;
Rajpalke, Mohana;
Kuroe, Haruhiko;
Vullum, Per Erik;
Weman, Helge;
Fimland, Bjørn-Ove.
(2018)
Vertical GaN nanocolumns grown on graphene intermediated with a thin AlN buffer layer.
Nanotechnology
Vitenskapelig artikkel
-
Ren, Dingding;
Ahtapodov, Lyubomir;
Nilsen, Julie Stene;
Yang, Jianfeng;
Gustafsson, Anders;
Huh, Junghwan.
(2018)
Single-mode near-infrared lasing in a GaAsSb-based nanowire superlattice at room temperature.
Nano Letters
Vitenskapelig artikkel
-
Ren, Fang;
Yin, Yue;
Wang, Yunyu;
Liu, Zhiqiang;
Meng, LIang;
Ou, Haiyan.
(2018)
Direct Growth of AlGaN Nanorod LEDs on Graphene-Covered Si.
Materials
Vitenskapelig artikkel
-
Munshi, A Mazid;
Kim, Dong-Chul;
Heimdal, Carl Philip J;
Heilmann, Martin;
Christiansen, Silke;
Vullum, Per Erik.
(2018)
Selective area growth of AlGaN nanopyramid arrays on graphene by metal-organic vapor phase epitaxy.
Applied Physics Letters
Vitenskapelig artikkel
2017
-
Liudi Mulyo, Andreas;
Konno, Yuta;
Nilsen, Julie Stene;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove;
Weman, Helge.
(2017)
Growth study of self-assembled GaN nanocolumns on silica glass by plasma assisted molecular beam epitaxy.
Journal of Crystal Growth
Vitenskapelig artikkel
-
Nam, Jungtae;
KIM, DONG CHUL;
Yun, Hoyeol;
Shin, Dong Hoon;
Nam, Seungjin;
Lee, Won Ki.
(2017)
Chemical vapor deposition of graphene on platinum: Growth and substrate interaction.
Carbon
Vitenskapelig artikkel
-
Ahtapodov, Lyubomir;
Kauko, Hanne;
Munshi, Abdul Mazid;
Fimland, Bjørn-Ove;
Van Helvoort, Antonius;
Weman, Helge.
(2017)
Determination of GaAs zinc blende/wurtzite band offsets utilizing GaAs nanowires with an axial GaAsSb insert.
Journal of Applied Physics
Vitenskapelig artikkel
-
Mosberg, Aleksander Buseth;
Myklebost, Steinar;
Ren, Dingding;
Weman, Helge;
Fimland, Bjørn-Ove;
Van Helvoort, Antonius.
(2017)
Evaluating focused ion beam patterning for position-controlled nanowire growth using computer vision.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
2016
-
Ahtapodov, Lyubomir;
Munshi, Abdul Mazid;
Nilsen, Julie Stene;
Reinertsen, Johannes F;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove.
(2016)
Effect of V/III ratio on the structural and optical properties of self-catalysed GaAs nanowires.
Nanotechnology
Vitenskapelig artikkel
-
Ren, Dingding;
Huh, Junghwan;
Dheeraj, D.L.;
Weman, Helge;
Fimland, Bjørn-Ove.
(2016)
Influence of Pitch on the Morphology and Luminescence Properties of Self-Catalyzed GaAsSb Nanowire Arrays
.
Applied Physics Letters
Vitenskapelig artikkel
-
Huh, Junghwan;
KIM, DONG CHUL;
Munshi, A Mazid;
Dheeraj, D.L.;
Jang, Doyoung;
Kim, Gyu-Tae.
(2016)
Low frequency noise in single GaAsSb
nanowires with self-induced compositional
gradients.
Nanotechnology
Vitenskapelig artikkel
-
Ren, Dingding;
Høiaas, Ida Marie;
Reinertsen, Johannes F;
Dasa Lakshmi Narayana, Dheeraj;
Munshi, Abdul Mazid;
KIM, DONG CHUL.
(2016)
Growth optimization for self-catalyzed GaAs-based nanowires on metal-induced crystallized amorphous substrate.
Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics
Vitenskapelig artikkel
-
Fauske, Vidar Tonaas;
Erlbeck, Maximilian;
Huh, Junghwan;
KIM, DONG CHUL;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj.
(2016)
In situ electronic probing of semiconducting nanowires in an electron microscope.
Journal of Microscopy
Vitenskapelig artikkel
-
Heilmann, Martin;
Munshi, Abdul Mazid;
Sarau, George;
Göbelt, Manuela;
Tessarek, Christian;
Fauske, Vidar Tonaas.
(2016)
Vertically Oriented Growth of GaN Nanorods on Si Using Graphene as an Atomically Thin Buffer Layer.
Nano Letters
Vitenskapelig artikkel
-
Fauske, Vidar Tonaas;
Huh, Junghwan;
Divitini, Giorgio;
Dasa Lakshmi Narayana, Dheeraj;
Munshi, Abdul Mazid;
Ducati, Caterina.
(2016)
In situ heat-induced replacement of GaAs Nanowires with Au.
Nano Letters
Vitenskapelig artikkel
-
Høiaas, Ida Marie;
KIM, DONG CHUL;
Weman, Helge.
(2016)
Fabrication of Si(111) crystalline thin film on graphene by aluminum-induced crystallization.
Applied Physics Letters
Vitenskapelig artikkel
-
Ren, Dingding;
Dheeraj, D.L.;
Jin, Chengjun;
Nilsen, Julie Stene;
Huh, Junghwan;
Reinertsen, Johannes F.
(2016)
New Insights into the Origins of Sb-Induced Effects on Self-Catalyzed GaAsSb Nanowire Arrays.
Nano Letters
Vitenskapelig artikkel
2015
-
Nilsen, Julie Stene;
Reinertsen, Johannes F;
Mosberg, Aleksander Buseth;
Fauske, Vidar Tonaas;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj.
(2015)
Radial composition variations in the shells of
GaAs/AlGaAs core-shell nanowires.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Svendsen, Guro Kristin;
Skaar, Johannes;
Weman, Helge;
Dupertuis, Marc-André.
(2015)
Symmetries and optical transitions of hexagonal quantum dots in GaAs/AlGaAs nanowires.
Physical Review B. Condensed Matter and Materials Physics
Vitenskapelig artikkel
-
Huh, Junghwan;
Yun, H.;
KIM, DONG CHUL;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Kauko, Hanne.
(2015)
Rectifying Single GaAsSb Nanowire Devices Based on Self-Induced Compositional Gradients.
Nano Letters
Vitenskapelig artikkel
2014
-
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Fauske, Vidar Tonaas;
KIM, DONG CHUL;
Huh, Junghwan;
Reinertsen, Johannes F.
(2014)
Position-Controlled Uniform GaAs Nanowires on Silicon using Nanoimprint Lithography.
Nano Letters
Vitenskapelig artikkel
-
Signorello, G.;
Lörtscher, E;
Khomyakov, P.A.;
Karg, S.;
Dasa Lakshmi Narayana, Dheeraj;
Gotsmann, B..
(2014)
Inducing a direct-to-pseudodirect bandgap transition in wurtzite GaAs nanowires with uniaxial stress.
Nature Communications
Vitenskapelig artikkel
-
Fauske, Vidar Tonaas;
KIM, DONG CHUL;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove;
Weman, Helge.
(2014)
In-situ electrical and structural characterization of individual GaAs nanowires.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
2013
-
Kauko, Hanne;
Grieb, Tim;
Bjørge, Ruben;
Schowalter, M.;
Munshi, Abdul Mazid;
Weman, Helge.
(2013)
Compositional characterization of GaAs/GaAsSb nanowires by quantitative HAADF-STEM.
Micron
Vitenskapelig oversiktsartikkel/review
-
Lim, Cheng Guan;
Weman, Helge.
(2013)
Numerical Analysis and Device Optimization of Radial p-n Junction GaAs/AlGaAs Core-Shell Nanowire Solar Cells.
Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices
Sammendrag/abstract
-
Weigand, Christian Carl;
Crisp, Ryan;
Ladam, Cecile;
Furtak, Tom;
Collins, Reuben;
Grepstad, Jostein.
(2013)
Electrical, optical and structural properties of Al-doped ZnO thin films grown on GaAs(111)B substrates by pulsed laser deposition.
Thin Solid Films
Vitenskapelig artikkel
-
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Todorovic, Jelena;
Van Helvoort, Antonius;
Weman, Helge;
Fimland, Bjørn-Ove.
(2013)
Crystal phase engineering in self-catalyzed GaAs and GaAs/GaAsSb nanowires grown on Si(111).
Journal of Crystal Growth
Vitenskapelig artikkel
-
Dasa Lakshmi Narayana, Dheeraj;
Munshi, Abdul Mazid;
Christoffersen, Ole Morten;
KIM, DONG CHUL;
Signorello, Giovanni;
Riel, H.
(2013)
Comparison of Be-doped GaAs nanowires grown by Au- and Ga-assisted molecular beam epitaxy.
Journal of Crystal Growth
Vitenskapelig artikkel
-
Ghalamestani, Sepideh Gorji;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove;
Weman, Helge;
Dick, Kimberly A.
(2013)
Self-catalyzed MBE grown GaAs/GaAsxSb1-x core-shell nanowires in ZB and WZ crystal structures.
Nanotechnology
Vitenskapelig artikkel
-
Munshi, Abdul Mazid;
Weman, Helge.
(2013)
Advances in semiconductor nanowire growth on graphene.
Physica Status Solidi. Rapid Research Letters
Vitenskapelig oversiktsartikkel/review
-
Dasa Lakshmi Narayana, Dheeraj;
Munshi, Abdul Mazid;
Scheffler, Martha;
Van Helvoort, Antonius;
Weman, Helge;
Fimland, Bjørn-Ove.
(2013)
Controlling crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy.
Nanotechnology
Vitenskapelig artikkel
-
Todorovic, Jelena;
Kauko, Hanne;
Ahtapodov, Lyubomir;
Anthonysamy, Fervin Moses;
Olk, Phillip;
Dasa Lakshmi Narayana, Dheeraj.
(2013)
The effects of Sb concentration variation on the optical properties of GaAsSb/GaAs heterostructured nanowires.
Semiconductor Science and Technology
Vitenskapelig artikkel
-
KIM, DONG CHUL;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove;
Weman, Helge.
(2013)
Polarization dependent photocurrent spectroscopy of single wurtzite GaAs/AlGaAs core-shell nanowires.
Applied Physics Letters
Vitenskapelig artikkel
2012
-
Weigand, Christian Carl;
Tveit, Johannes;
Ladam, Cecile;
Holmestad, Randi;
Grepstad, Jostein;
Weman, Helge.
(2012)
Epitaxial relationships of ZnO nanostructures grown by Au-assisted pulsed laser deposition on c- and a-plane sapphire.
Journal of Crystal Growth
Vitenskapelig artikkel
-
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Fauske, Vidar Tonaas;
DONG CHUL, KIM;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2012)
Vertically Aligned GaAs Nanowires on Graphite and Few-Layer Graphene: Generic Model and Epitaxial Growth.
Nano Letters
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Weman, Helge;
Grepstad, Jostein.
(2012)
ZnO nanostructures grown by pulsed laser deposition.
NTNU-trykk
Doktorgradsavhandling
-
Ahtapodov, Lyubomir;
Todorovic, Jelena;
Olk, Phillip;
Mjåland, Terje Sund;
Slåttnes, Patrick Rene Tollefsen;
Dasa Lakshmi Narayana, Dheeraj.
(2012)
A Story Told by a Single Nanowire: Optical Properties of Wurtzite GaAs.
Nano Letters
Vitenskapelig artikkel
-
Svendsen, Guro Kristin;
Weman, Helge;
Skaar, Johannes.
(2012)
Investigations of Bragg reflectors in nanowire lasers.
Journal of Applied Physics
Vitenskapelig artikkel
2011
-
Todorovic, Jelena;
Anthonysamy, Fervin Moses;
Karlberg, Thomas Andre;
Olk, Phillip;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove.
(2011)
Correlated micro-photoluminescence and electron microscopy studies of the same individual heterostructured semiconductor nanowires.
Nanotechnology
Vitenskapelig artikkel
-
DONG CHUL, KIM;
Ahtapodov, Lyubomir;
Boe, A.B.;
Choi, J. W.;
Ji, H;
Kim, G. T..
(2011)
Photocurrent Spectroscopy of Single Wurtzite GaAs Nanowires.
AIP Conference Proceedings
Vitenskapelig artikkel
-
Todorovic, Jelena;
Anthonysamy, Fervin Moses;
Dasa Lakshmi Narayana, Dheeraj;
Olk, Phillip;
Fimland, Bjørn-Ove;
Weman, Helge.
(2011)
Correlated micro-photoluminescence and electron microscopy study of a heterostructured semiconductor nanowire.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Skåre, Daniel;
Ladam, Cecile;
Grepstad, Jostein;
Weman, Helge.
(2011)
Effects of substrate annealing on the gold-catalyzed growth of ZnO nanostructures.
Nanoscale Research Letters
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Bergren, M.R.;
Ladam, Cecile;
Tveit, Johannes;
Holmestad, Randi;
Vullum, Per Erik.
(2011)
Formation of ZnO Nanosheets Grown by Catalyst-Assisted Pulsed Laser Deposition.
Crystal Growth & Design
Vitenskapelig artikkel
-
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Ahtapodov, Lyubomir;
Dasa Lakshmi Narayana, Dheeraj;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2011)
Photoluminescence Polarization Anisotropy in a Single Heterostructured III-V Nanowire with Mixed Crystal Phases.
AIP Conference Proceedings
Vitenskapelig artikkel
-
Svendsen, Guro Kristin;
Weman, Helge;
Skaar, Johannes.
(2011)
Model for reflection and transmission matrices of nanowire end facets.
Journal of Applied Physics
Vitenskapelig artikkel
2010
-
Van Helvoort, Antonius;
Dasa, Lakshmi Narayana;
Zhou, Hailong;
Grønsberg, Sondre;
Patriarche, G;
Fimland, Bjørn-Ove.
(2010)
Dark field transmission electron microscopy techniques for structural characterization of nanowire heterostructures.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Dasa, Lakshmi Narayana;
Zhou, Hailong;
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2010)
Heterostructured III-V Nanowires with Mixed Crystal Phases Grown by Au-assisted Molecular Beam Epitaxy.
IntechOpen
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Hoang, Thang Ba;
Anthonysamy, Fervin Moses;
Ahtapodov, Lyubomir;
Zhou, Hailong;
Dasa, Lakshmi Narayana;
Van Helvoort, Antonius.
(2010)
Engineering Parallel and Perpendicular Polarized Photoluminescence from a Single Semiconductor Nanowire by Crystal Phase Control.
Nano Letters
Vitenskapelig artikkel
-
Dasa, Lakshmi Narayana;
Zhou, Hailong;
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2010)
Growth of heterostructured III-V nanowires by molecular beam epitaxy for photonic applications.
Proceedings of SPIE, the International Society for Optical Engineering
Vitenskapelig artikkel
2009
-
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Dasa, Lakshmi Narayana;
Zhou, Hailong;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2009)
Micro-photoluminescence study of single GaAsSb/GaAs radial and axial heterostructured core-shell nanowires.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Hoang, Thang Ba;
Anthonysamy, Fervin Moses;
Zhou, Hailong;
Dasa, Lakshmi Narayana;
Fimland, Bjørn-Ove;
Weman, Helge.
(2009)
Observation of free exciton photoluminescence emission from single wurtzite GaAs nanowires.
Applied Physics Letters
Vitenskapelig artikkel
-
Zhou, Hailong;
Hoang, Thang Ba;
Dasa, Lakshmi Narayana;
Van Helvoort, Antonius;
Liu, L;
Harmand, J.C..
(2009)
Wurtzite GaAs/AlGaAs core-shell nanowires grown by molecular beam epitaxy.
Nanotechnology
Vitenskapelig artikkel
-
Hoang, Thang Ba;
Zhou, Hailong;
Anthonysamy, Fervin Moses;
Dasa, Lakshmi Narayana;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2009)
Optical properties of single wurtzite GaAs nanowiresand GaAs nanowires with GaAsSb inserts.
Materials Research Society Symposium Proceedings
Vitenskapelig artikkel
-
Weman, Helge;
Palmgren, S.;
Karlsson, F.K.;
Rudra, A.;
Kapon, E.;
Dheeraj, D.L..
(2009)
Semiconductor quantum-wires and nano-wires for optoelectronic applications.
Journal of materials science. Materials in electronics
Vitenskapelig artikkel
-
Dasa, Lakshmi Narayana;
Patriarche, G.;
Zhou, Hailong;
Harmand, J.C.;
Weman, Helge;
Fimland, Bjørn-Ove.
(2009)
Growth and structural characterization of GaAs/GaAsSb axial heterostructured nanowires.
Journal of Crystal Growth
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Bergren, Matt;
Ladam, Cecile;
Vullum, Per Erik;
Walmsley, John C;
Fagerberg, Ragnar.
(2009)
Characterization of ZnO Nanostructures Grown by Pulsed Laser Deposition.
Materials Research Society Symposium Proceedings
Vitenskapelig artikkel
-
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Dasa Lakshmi Narayana, Dheeraj;
Zhou, Hailong;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2009)
Micro-photoluminescence study of single GaAsSb/GaAs radial and axial heterostructured core-shell nanowires.
IOP Conference Series: Earth and Environmental Science (EES)
Vitenskapelig artikkel
2008
-
Dasa, Lakshmi Narayana;
Patriarche, G;
Largeau, L;
Zhou, Hailong;
Van Helvoort, Antonius;
Glas, F.
(2008)
Zinc blende GaAsSb nanowires grown by molecular beam epitaxy.
Nanotechnology
Vitenskapelig artikkel
-
Dasa, Lakshmi Narayana;
Patriarche, G.;
Zhou, Hailong;
Hoang, Thang Ba;
Anthonysamy, Fervin Moses;
Grønsberg, Sondre.
(2008)
Growth and characterization of GaAs nanowires with defect-free zinc blende GaAsSb inserts.
Nano Letters
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Bergren, Matt;
Valset, Kjetil;
Carey, David;
Fagerberg, Ragnar;
Ladam, Cecile.
(2008)
Characterization of ZnO Layers Grown by Pulsed Laser Deposition for Hybrid Inorganic/Organic Solar Cells.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2007
-
Karlsson, F.K.;
Weman, Helge;
Leifer, K.;
Rudra, A.;
Kapon, E.;
Lyo, S.K..
(2007)
Strongly reduced exciton transfer between parallel quantum wires.
Applied Physics Letters
Vitenskapelig artikkel
2006
-
Palmgren, S.;
Weman, Helge;
Schoenberg, A.;
Karlsson, F.K.;
Dupertuis, M.-A.;
Leifer, K..
(2006)
Polarization-resolved optical absorption in single V-groove quantum wires.
Applied Physics Letters
Vitenskapelig artikkel
-
Reichardt, H.;
Leifer, K.;
Pelucchi, E.;
Karlsson, F.K.;
Weman, Helge;
Rudra, A..
(2006)
Influence of long-range substrate roughness on disorder in V-groove quantum wire structures.
Journal of Applied Physics
Vitenskapelig artikkel
2005
-
Karlsson, F.K.;
Weman, Helge;
Leifer, K.;
Rudra, A.;
Kapon, E..
(2005)
Carrier tunneling between parallel GaAs/AlGaAs quantum wires.
AIP Conference Proceedings
Vitenskapelig artikkel
-
Karlsson, F.K.;
Dupertuis, M.-A.;
Weman, Helge;
Kapon, E..
(2005)
The fractional-dimensional excitonic absorption theory applied to real V-groove quantum wires.
AIP Conference Proceedings
Vitenskapelig artikkel
Tidsskriftspublikasjoner
-
Ren, Dingding;
Nilsen, Tron Arne;
Nilsen, Julie Stene;
Ahtapodov, Lyubomir;
Mukherjee, Anjan;
Li, Yang.
(2024)
Quasi van der Waals Epitaxial Growth of GaAsSb Nanowires on Graphitic Substrate for Photonic Applications.
ACS Applied Nano Materials
Vitenskapelig artikkel
-
Mosberg, Aleksander Buseth;
Ren, Dingding;
Ahtapodov, Lyubomir;
Weman, Helge;
Fimland, Bjørn Ove Myking;
Van Helvoort, Antonius.
(2023)
Focused ion beam lithography for position-controlled nanowire growth.
Nanotechnology
Vitenskapelig artikkel
-
Mukherjee, Anjan;
Ren, Dingding;
Mosberg, Aleksander Buseth;
Vullum, Per Erik;
Van Helvoort, Antonius;
Fimland, Bjørn Ove Myking.
(2023)
Origin of Leakage Currents and Nanowire-to-Nanowire Inhomogeneity in Radial p-i-n Junction GaAs Nanowire Array Solar Cells on Si.
ACS Applied Nano Materials
Vitenskapelig artikkel
-
Liudi Mulyo, Andreas;
Mukherjee, Anjan;
Høiaas, Ida Marie;
Ahtapodov, Lyubomir;
Nilsen, Tron Arne;
Toftevaag, Håvard Hem.
(2021)
Graphene-Based Transparent Conducting Substrates for GaN/AlGaN Nanocolumn Flip-Chip Ultraviolet Light-Emitting Diodes.
ACS Applied Nano Materials
Vitenskapelig artikkel
-
Mukherjee, Anjan;
Ren, Dingding;
Vullum, Per Erik;
Huh, Junghwan;
Fimland, Bjørn-Ove;
Weman, Helge.
(2021)
GaAs/AlGaAs Nanowire Array Solar Cell Grown on Si with Ultrahigh Power-per-Weight Ratio.
ACS Photonics
Vitenskapelig artikkel
-
Liudi Mulyo, Andreas;
Rajpalke, Mohana;
Vullum, Per Erik;
Weman, Helge;
Kishino, Katsumi;
Fimland, Bjørn-Ove.
(2020)
The influence of AlN buffer layer on the growth of self-assembled GaN nanocolumns on graphene.
Scientific Reports
Vitenskapelig artikkel
-
Høiaas, Ida Marie;
Liudi Mulyo, Andreas;
Vullum, Per Erik;
Kim, Dong Chul;
Ahtapodov, Lyubomir;
Fimland, Bjørn-Ove.
(2019)
GaN/AlGaN nanocolumn ultraviolet light-emitting diode using double-Layer graphene as substrate and transparent electrode.
Nano Letters
Vitenskapelig artikkel
-
Liudi Mulyo, Andreas;
Rajpalke, Mohana;
Kuroe, Haruhiko;
Vullum, Per Erik;
Weman, Helge;
Fimland, Bjørn-Ove.
(2019)
Erratum: Vertical GaN nanocolumns grown on graphene intermediated with a thin AlN buffer layer (Nanotechnology 30 015604).
Nanotechnology
Errata
-
Ren, Dingding;
Ahtapodov, Lyubomir;
Van Helvoort, Antonius;
Weman, Helge;
Fimland, Bjørn-Ove.
(2019)
Epitaxially grown III-arsenide-antimonide nanowires for optoelectronic applications.
Nanotechnology
Vitenskapelig artikkel
-
Wang, Yunyu;
Dheeraj, Dasa;
Liu, Zhiqiang;
Liang, Meng;
Li, Yang;
Yi, Xiaoyan.
(2019)
AlGaN Nanowires Grown on SiO2/Si (100) Using Graphene as a Buffer Layer.
Crystal Growth & Design
Vitenskapelig artikkel
-
Mukherjee, Anjan;
Yun, Hoyeol;
Shin, Dong Hoon;
Nam, Jungtae;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj.
(2019)
Single GaAs Nanowire/Graphene Hybrid Devices Fabricated by a Position-Controlled Microtransfer and an Imprinting Technique for an Embedded Structure.
ACS Applied Materials & Interfaces
Vitenskapelig artikkel
-
Liudi Mulyo, Andreas;
Rajpalke, Mohana;
Kuroe, Haruhiko;
Vullum, Per Erik;
Weman, Helge;
Fimland, Bjørn-Ove.
(2018)
Vertical GaN nanocolumns grown on graphene intermediated with a thin AlN buffer layer.
Nanotechnology
Vitenskapelig artikkel
-
Ren, Dingding;
Ahtapodov, Lyubomir;
Nilsen, Julie Stene;
Yang, Jianfeng;
Gustafsson, Anders;
Huh, Junghwan.
(2018)
Single-mode near-infrared lasing in a GaAsSb-based nanowire superlattice at room temperature.
Nano Letters
Vitenskapelig artikkel
-
Ren, Fang;
Yin, Yue;
Wang, Yunyu;
Liu, Zhiqiang;
Meng, LIang;
Ou, Haiyan.
(2018)
Direct Growth of AlGaN Nanorod LEDs on Graphene-Covered Si.
Materials
Vitenskapelig artikkel
-
Munshi, A Mazid;
Kim, Dong-Chul;
Heimdal, Carl Philip J;
Heilmann, Martin;
Christiansen, Silke;
Vullum, Per Erik.
(2018)
Selective area growth of AlGaN nanopyramid arrays on graphene by metal-organic vapor phase epitaxy.
Applied Physics Letters
Vitenskapelig artikkel
-
Liudi Mulyo, Andreas;
Konno, Yuta;
Nilsen, Julie Stene;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove;
Weman, Helge.
(2017)
Growth study of self-assembled GaN nanocolumns on silica glass by plasma assisted molecular beam epitaxy.
Journal of Crystal Growth
Vitenskapelig artikkel
-
Nam, Jungtae;
KIM, DONG CHUL;
Yun, Hoyeol;
Shin, Dong Hoon;
Nam, Seungjin;
Lee, Won Ki.
(2017)
Chemical vapor deposition of graphene on platinum: Growth and substrate interaction.
Carbon
Vitenskapelig artikkel
-
Ahtapodov, Lyubomir;
Kauko, Hanne;
Munshi, Abdul Mazid;
Fimland, Bjørn-Ove;
Van Helvoort, Antonius;
Weman, Helge.
(2017)
Determination of GaAs zinc blende/wurtzite band offsets utilizing GaAs nanowires with an axial GaAsSb insert.
Journal of Applied Physics
Vitenskapelig artikkel
-
Mosberg, Aleksander Buseth;
Myklebost, Steinar;
Ren, Dingding;
Weman, Helge;
Fimland, Bjørn-Ove;
Van Helvoort, Antonius.
(2017)
Evaluating focused ion beam patterning for position-controlled nanowire growth using computer vision.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Ahtapodov, Lyubomir;
Munshi, Abdul Mazid;
Nilsen, Julie Stene;
Reinertsen, Johannes F;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove.
(2016)
Effect of V/III ratio on the structural and optical properties of self-catalysed GaAs nanowires.
Nanotechnology
Vitenskapelig artikkel
-
Ren, Dingding;
Huh, Junghwan;
Dheeraj, D.L.;
Weman, Helge;
Fimland, Bjørn-Ove.
(2016)
Influence of Pitch on the Morphology and Luminescence Properties of Self-Catalyzed GaAsSb Nanowire Arrays
.
Applied Physics Letters
Vitenskapelig artikkel
-
Huh, Junghwan;
KIM, DONG CHUL;
Munshi, A Mazid;
Dheeraj, D.L.;
Jang, Doyoung;
Kim, Gyu-Tae.
(2016)
Low frequency noise in single GaAsSb
nanowires with self-induced compositional
gradients.
Nanotechnology
Vitenskapelig artikkel
-
Ren, Dingding;
Høiaas, Ida Marie;
Reinertsen, Johannes F;
Dasa Lakshmi Narayana, Dheeraj;
Munshi, Abdul Mazid;
KIM, DONG CHUL.
(2016)
Growth optimization for self-catalyzed GaAs-based nanowires on metal-induced crystallized amorphous substrate.
Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics
Vitenskapelig artikkel
-
Fauske, Vidar Tonaas;
Erlbeck, Maximilian;
Huh, Junghwan;
KIM, DONG CHUL;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj.
(2016)
In situ electronic probing of semiconducting nanowires in an electron microscope.
Journal of Microscopy
Vitenskapelig artikkel
-
Heilmann, Martin;
Munshi, Abdul Mazid;
Sarau, George;
Göbelt, Manuela;
Tessarek, Christian;
Fauske, Vidar Tonaas.
(2016)
Vertically Oriented Growth of GaN Nanorods on Si Using Graphene as an Atomically Thin Buffer Layer.
Nano Letters
Vitenskapelig artikkel
-
Fauske, Vidar Tonaas;
Huh, Junghwan;
Divitini, Giorgio;
Dasa Lakshmi Narayana, Dheeraj;
Munshi, Abdul Mazid;
Ducati, Caterina.
(2016)
In situ heat-induced replacement of GaAs Nanowires with Au.
Nano Letters
Vitenskapelig artikkel
-
Høiaas, Ida Marie;
KIM, DONG CHUL;
Weman, Helge.
(2016)
Fabrication of Si(111) crystalline thin film on graphene by aluminum-induced crystallization.
Applied Physics Letters
Vitenskapelig artikkel
-
Ren, Dingding;
Dheeraj, D.L.;
Jin, Chengjun;
Nilsen, Julie Stene;
Huh, Junghwan;
Reinertsen, Johannes F.
(2016)
New Insights into the Origins of Sb-Induced Effects on Self-Catalyzed GaAsSb Nanowire Arrays.
Nano Letters
Vitenskapelig artikkel
-
Nilsen, Julie Stene;
Reinertsen, Johannes F;
Mosberg, Aleksander Buseth;
Fauske, Vidar Tonaas;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj.
(2015)
Radial composition variations in the shells of
GaAs/AlGaAs core-shell nanowires.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Svendsen, Guro Kristin;
Skaar, Johannes;
Weman, Helge;
Dupertuis, Marc-André.
(2015)
Symmetries and optical transitions of hexagonal quantum dots in GaAs/AlGaAs nanowires.
Physical Review B. Condensed Matter and Materials Physics
Vitenskapelig artikkel
-
Huh, Junghwan;
Yun, H.;
KIM, DONG CHUL;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Kauko, Hanne.
(2015)
Rectifying Single GaAsSb Nanowire Devices Based on Self-Induced Compositional Gradients.
Nano Letters
Vitenskapelig artikkel
-
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Fauske, Vidar Tonaas;
KIM, DONG CHUL;
Huh, Junghwan;
Reinertsen, Johannes F.
(2014)
Position-Controlled Uniform GaAs Nanowires on Silicon using Nanoimprint Lithography.
Nano Letters
Vitenskapelig artikkel
-
Signorello, G.;
Lörtscher, E;
Khomyakov, P.A.;
Karg, S.;
Dasa Lakshmi Narayana, Dheeraj;
Gotsmann, B..
(2014)
Inducing a direct-to-pseudodirect bandgap transition in wurtzite GaAs nanowires with uniaxial stress.
Nature Communications
Vitenskapelig artikkel
-
Fauske, Vidar Tonaas;
KIM, DONG CHUL;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove;
Weman, Helge.
(2014)
In-situ electrical and structural characterization of individual GaAs nanowires.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Kauko, Hanne;
Grieb, Tim;
Bjørge, Ruben;
Schowalter, M.;
Munshi, Abdul Mazid;
Weman, Helge.
(2013)
Compositional characterization of GaAs/GaAsSb nanowires by quantitative HAADF-STEM.
Micron
Vitenskapelig oversiktsartikkel/review
-
Lim, Cheng Guan;
Weman, Helge.
(2013)
Numerical Analysis and Device Optimization of Radial p-n Junction GaAs/AlGaAs Core-Shell Nanowire Solar Cells.
Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices
Sammendrag/abstract
-
Weigand, Christian Carl;
Crisp, Ryan;
Ladam, Cecile;
Furtak, Tom;
Collins, Reuben;
Grepstad, Jostein.
(2013)
Electrical, optical and structural properties of Al-doped ZnO thin films grown on GaAs(111)B substrates by pulsed laser deposition.
Thin Solid Films
Vitenskapelig artikkel
-
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Todorovic, Jelena;
Van Helvoort, Antonius;
Weman, Helge;
Fimland, Bjørn-Ove.
(2013)
Crystal phase engineering in self-catalyzed GaAs and GaAs/GaAsSb nanowires grown on Si(111).
Journal of Crystal Growth
Vitenskapelig artikkel
-
Dasa Lakshmi Narayana, Dheeraj;
Munshi, Abdul Mazid;
Christoffersen, Ole Morten;
KIM, DONG CHUL;
Signorello, Giovanni;
Riel, H.
(2013)
Comparison of Be-doped GaAs nanowires grown by Au- and Ga-assisted molecular beam epitaxy.
Journal of Crystal Growth
Vitenskapelig artikkel
-
Ghalamestani, Sepideh Gorji;
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove;
Weman, Helge;
Dick, Kimberly A.
(2013)
Self-catalyzed MBE grown GaAs/GaAsxSb1-x core-shell nanowires in ZB and WZ crystal structures.
Nanotechnology
Vitenskapelig artikkel
-
Munshi, Abdul Mazid;
Weman, Helge.
(2013)
Advances in semiconductor nanowire growth on graphene.
Physica Status Solidi. Rapid Research Letters
Vitenskapelig oversiktsartikkel/review
-
Dasa Lakshmi Narayana, Dheeraj;
Munshi, Abdul Mazid;
Scheffler, Martha;
Van Helvoort, Antonius;
Weman, Helge;
Fimland, Bjørn-Ove.
(2013)
Controlling crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy.
Nanotechnology
Vitenskapelig artikkel
-
Todorovic, Jelena;
Kauko, Hanne;
Ahtapodov, Lyubomir;
Anthonysamy, Fervin Moses;
Olk, Phillip;
Dasa Lakshmi Narayana, Dheeraj.
(2013)
The effects of Sb concentration variation on the optical properties of GaAsSb/GaAs heterostructured nanowires.
Semiconductor Science and Technology
Vitenskapelig artikkel
-
KIM, DONG CHUL;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove;
Weman, Helge.
(2013)
Polarization dependent photocurrent spectroscopy of single wurtzite GaAs/AlGaAs core-shell nanowires.
Applied Physics Letters
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Tveit, Johannes;
Ladam, Cecile;
Holmestad, Randi;
Grepstad, Jostein;
Weman, Helge.
(2012)
Epitaxial relationships of ZnO nanostructures grown by Au-assisted pulsed laser deposition on c- and a-plane sapphire.
Journal of Crystal Growth
Vitenskapelig artikkel
-
Munshi, Abdul Mazid;
Dasa Lakshmi Narayana, Dheeraj;
Fauske, Vidar Tonaas;
DONG CHUL, KIM;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2012)
Vertically Aligned GaAs Nanowires on Graphite and Few-Layer Graphene: Generic Model and Epitaxial Growth.
Nano Letters
Vitenskapelig artikkel
-
Ahtapodov, Lyubomir;
Todorovic, Jelena;
Olk, Phillip;
Mjåland, Terje Sund;
Slåttnes, Patrick Rene Tollefsen;
Dasa Lakshmi Narayana, Dheeraj.
(2012)
A Story Told by a Single Nanowire: Optical Properties of Wurtzite GaAs.
Nano Letters
Vitenskapelig artikkel
-
Svendsen, Guro Kristin;
Weman, Helge;
Skaar, Johannes.
(2012)
Investigations of Bragg reflectors in nanowire lasers.
Journal of Applied Physics
Vitenskapelig artikkel
-
Todorovic, Jelena;
Anthonysamy, Fervin Moses;
Karlberg, Thomas Andre;
Olk, Phillip;
Dasa Lakshmi Narayana, Dheeraj;
Fimland, Bjørn-Ove.
(2011)
Correlated micro-photoluminescence and electron microscopy studies of the same individual heterostructured semiconductor nanowires.
Nanotechnology
Vitenskapelig artikkel
-
DONG CHUL, KIM;
Ahtapodov, Lyubomir;
Boe, A.B.;
Choi, J. W.;
Ji, H;
Kim, G. T..
(2011)
Photocurrent Spectroscopy of Single Wurtzite GaAs Nanowires.
AIP Conference Proceedings
Vitenskapelig artikkel
-
Todorovic, Jelena;
Anthonysamy, Fervin Moses;
Dasa Lakshmi Narayana, Dheeraj;
Olk, Phillip;
Fimland, Bjørn-Ove;
Weman, Helge.
(2011)
Correlated micro-photoluminescence and electron microscopy study of a heterostructured semiconductor nanowire.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Skåre, Daniel;
Ladam, Cecile;
Grepstad, Jostein;
Weman, Helge.
(2011)
Effects of substrate annealing on the gold-catalyzed growth of ZnO nanostructures.
Nanoscale Research Letters
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Bergren, M.R.;
Ladam, Cecile;
Tveit, Johannes;
Holmestad, Randi;
Vullum, Per Erik.
(2011)
Formation of ZnO Nanosheets Grown by Catalyst-Assisted Pulsed Laser Deposition.
Crystal Growth & Design
Vitenskapelig artikkel
-
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Ahtapodov, Lyubomir;
Dasa Lakshmi Narayana, Dheeraj;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2011)
Photoluminescence Polarization Anisotropy in a Single Heterostructured III-V Nanowire with Mixed Crystal Phases.
AIP Conference Proceedings
Vitenskapelig artikkel
-
Svendsen, Guro Kristin;
Weman, Helge;
Skaar, Johannes.
(2011)
Model for reflection and transmission matrices of nanowire end facets.
Journal of Applied Physics
Vitenskapelig artikkel
-
Van Helvoort, Antonius;
Dasa, Lakshmi Narayana;
Zhou, Hailong;
Grønsberg, Sondre;
Patriarche, G;
Fimland, Bjørn-Ove.
(2010)
Dark field transmission electron microscopy techniques for structural characterization of nanowire heterostructures.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Hoang, Thang Ba;
Anthonysamy, Fervin Moses;
Ahtapodov, Lyubomir;
Zhou, Hailong;
Dasa, Lakshmi Narayana;
Van Helvoort, Antonius.
(2010)
Engineering Parallel and Perpendicular Polarized Photoluminescence from a Single Semiconductor Nanowire by Crystal Phase Control.
Nano Letters
Vitenskapelig artikkel
-
Dasa, Lakshmi Narayana;
Zhou, Hailong;
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2010)
Growth of heterostructured III-V nanowires by molecular beam epitaxy for photonic applications.
Proceedings of SPIE, the International Society for Optical Engineering
Vitenskapelig artikkel
-
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Dasa, Lakshmi Narayana;
Zhou, Hailong;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2009)
Micro-photoluminescence study of single GaAsSb/GaAs radial and axial heterostructured core-shell nanowires.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Hoang, Thang Ba;
Anthonysamy, Fervin Moses;
Zhou, Hailong;
Dasa, Lakshmi Narayana;
Fimland, Bjørn-Ove;
Weman, Helge.
(2009)
Observation of free exciton photoluminescence emission from single wurtzite GaAs nanowires.
Applied Physics Letters
Vitenskapelig artikkel
-
Zhou, Hailong;
Hoang, Thang Ba;
Dasa, Lakshmi Narayana;
Van Helvoort, Antonius;
Liu, L;
Harmand, J.C..
(2009)
Wurtzite GaAs/AlGaAs core-shell nanowires grown by molecular beam epitaxy.
Nanotechnology
Vitenskapelig artikkel
-
Hoang, Thang Ba;
Zhou, Hailong;
Anthonysamy, Fervin Moses;
Dasa, Lakshmi Narayana;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2009)
Optical properties of single wurtzite GaAs nanowiresand GaAs nanowires with GaAsSb inserts.
Materials Research Society Symposium Proceedings
Vitenskapelig artikkel
-
Weman, Helge;
Palmgren, S.;
Karlsson, F.K.;
Rudra, A.;
Kapon, E.;
Dheeraj, D.L..
(2009)
Semiconductor quantum-wires and nano-wires for optoelectronic applications.
Journal of materials science. Materials in electronics
Vitenskapelig artikkel
-
Dasa, Lakshmi Narayana;
Patriarche, G.;
Zhou, Hailong;
Harmand, J.C.;
Weman, Helge;
Fimland, Bjørn-Ove.
(2009)
Growth and structural characterization of GaAs/GaAsSb axial heterostructured nanowires.
Journal of Crystal Growth
Vitenskapelig artikkel
-
Weigand, Christian Carl;
Bergren, Matt;
Ladam, Cecile;
Vullum, Per Erik;
Walmsley, John C;
Fagerberg, Ragnar.
(2009)
Characterization of ZnO Nanostructures Grown by Pulsed Laser Deposition.
Materials Research Society Symposium Proceedings
Vitenskapelig artikkel
-
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Dasa Lakshmi Narayana, Dheeraj;
Zhou, Hailong;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2009)
Micro-photoluminescence study of single GaAsSb/GaAs radial and axial heterostructured core-shell nanowires.
IOP Conference Series: Earth and Environmental Science (EES)
Vitenskapelig artikkel
-
Dasa, Lakshmi Narayana;
Patriarche, G;
Largeau, L;
Zhou, Hailong;
Van Helvoort, Antonius;
Glas, F.
(2008)
Zinc blende GaAsSb nanowires grown by molecular beam epitaxy.
Nanotechnology
Vitenskapelig artikkel
-
Dasa, Lakshmi Narayana;
Patriarche, G.;
Zhou, Hailong;
Hoang, Thang Ba;
Anthonysamy, Fervin Moses;
Grønsberg, Sondre.
(2008)
Growth and characterization of GaAs nanowires with defect-free zinc blende GaAsSb inserts.
Nano Letters
Vitenskapelig artikkel
-
Karlsson, F.K.;
Weman, Helge;
Leifer, K.;
Rudra, A.;
Kapon, E.;
Lyo, S.K..
(2007)
Strongly reduced exciton transfer between parallel quantum wires.
Applied Physics Letters
Vitenskapelig artikkel
-
Palmgren, S.;
Weman, Helge;
Schoenberg, A.;
Karlsson, F.K.;
Dupertuis, M.-A.;
Leifer, K..
(2006)
Polarization-resolved optical absorption in single V-groove quantum wires.
Applied Physics Letters
Vitenskapelig artikkel
-
Reichardt, H.;
Leifer, K.;
Pelucchi, E.;
Karlsson, F.K.;
Weman, Helge;
Rudra, A..
(2006)
Influence of long-range substrate roughness on disorder in V-groove quantum wire structures.
Journal of Applied Physics
Vitenskapelig artikkel
-
Karlsson, F.K.;
Weman, Helge;
Leifer, K.;
Rudra, A.;
Kapon, E..
(2005)
Carrier tunneling between parallel GaAs/AlGaAs quantum wires.
AIP Conference Proceedings
Vitenskapelig artikkel
-
Karlsson, F.K.;
Dupertuis, M.-A.;
Weman, Helge;
Kapon, E..
(2005)
The fractional-dimensional excitonic absorption theory applied to real V-groove quantum wires.
AIP Conference Proceedings
Vitenskapelig artikkel
Del av bok/rapport
-
Dasa, Lakshmi Narayana;
Zhou, Hailong;
Anthonysamy, Fervin Moses;
Hoang, Thang Ba;
Van Helvoort, Antonius;
Fimland, Bjørn-Ove.
(2010)
Heterostructured III-V Nanowires with Mixed Crystal Phases Grown by Au-assisted Molecular Beam Epitaxy.
IntechOpen
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Weigand, Christian Carl;
Bergren, Matt;
Valset, Kjetil;
Carey, David;
Fagerberg, Ragnar;
Ladam, Cecile.
(2008)
Characterization of ZnO Layers Grown by Pulsed Laser Deposition for Hybrid Inorganic/Organic Solar Cells.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Rapport
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Liudi Mulyo, Andreas;
Fimland, Bjørn-Ove;
Weman, Helge.
(2021)
Molecular Beam Epitaxy of GaN/AlGaN Nanocolumns on Graphene: for Potential Application in Ultraviolet Light-Emitting Diodes.
Doctoral theses at NTNU (217)
Doktorgradsavhandling
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Weigand, Christian Carl;
Weman, Helge;
Grepstad, Jostein.
(2012)
ZnO nanostructures grown by pulsed laser deposition.
NTNU-trykk
Doktorgradsavhandling
Undervisning
Emner
Formidling
2024
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Faglig foredragWeman, Helge. (2024) III-V nanowire/graphene hybrid structures for applications in solar cells and UV LEDs. Invited talk , Lausanne 2024-06-12 - 2024-06-12
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Vitenskapelig foredragGupta, Dishiti; Nilsen, Tron Arne; Fimland, Bjørn Ove Myking; Weman, Helge. (2024) Improving the Efficiency of Top-emitting AlGaN Nanowire Photonic Crystal Laser by Structural Modification. NUSOD , New Delhi 2024-09-23 - 2024-09-26
2023
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Vitenskapelig foredragWeman, Helge. (2023) III-V nanowire/graphene hybrid structures for applications in solar cells and UVC LEDs. EPFL Invited talk at EPFL , Lausanne 2023-06-14 - 2023-06-14
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PosterLi, Yang; Nilsen, Tron Arne; Baigarinova, Gulzhan; Gupta, Dishiti; Ren, Dingding; Fimland, Bjørn Ove Myking. (2023) Exploring graphene as buffer for gallium nitride nanowire growth on silicon. NTNU NANO Norwegian NanoSymposium 2023 , Trondheim 2023-11-28 - 2023-11-29
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Vitenskapelig foredragNilsen, Julie Stene; Huh, Junghwan; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Weman, Helge; Fimland, Bjørn Ove Myking. (2023) Understanding the structure and composition of an annealed Pd/Ge/Au Contacts to n-GaAs Nanowires. Institue of Physics / EMAG Microscopy of Semiconducting Materials , Cambridge 2023-04-03 -
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PosterLi, Yang; Nilsen, Tron Arne; Baigarinova, Gulzhan; Gupta, Dishiti; Ren, Dingding; Fimland, Bjørn Ove Myking. (2023) GaN nanowires grown on Si by plasma-assisted molecular beam epitaxy using graphene as buffer . 14th Int. Conf. on Nitride Semiconductors , Fukuoka 2023-11-12 - 2023-11-17
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Vitenskapelig foredragWeman, Helge. (2023) UV LEDs based on AlGaN nanowires grown on graphene. The 3rd Ultraviolet LED InternationalConference , Changzhi 2023-09-12 - 2023-09-14
2022
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PosterRen, Dingding; Chen, Z.; Borisov, B.; Vullum, Per Erik; Nilsen, Julie Stene; Ahtapodov, Lyubomir. (2022) Growth and Characterization of InGaN/GaN Nanowires on Graphene Glass. Int. Workshop on Nitride Semiconductors , Berlin 2022-10-09 -
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PosterLi, Yang; Nilsen, Tron Arne; Mukherjee, Anjan; Ren, Dingding; Weman, Helge; Fimland, Bjørn Ove Myking. (2022) Selective area epitaxy of GaN nanowires on graphene substrates by plasma assisted molecular beam epitaxy. University of Sheffield and Institute of Physics, UK The 22nd International Conference on Molecular Beam Epitaxy , Sheffield 2022-09-04 - 2022-09-09
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PosterRen, Dingding; Nilsen, Tron Arne; Nilsen, Julie Stene; Ahtapodov, Lyubomir; Mukherjee, Anjan; Li, Yang. (2022) MBE Growth of GaAsSb/GaAs Multiple Quantum Disk Nanowires on Few-layer Graphene for Photonic Applications. University of Sheffield and Institute of Physics, UK 22nd International Conference on Molecular Beam Epitaxy , Sheffield, UK 2022-09-04 - 2022-09-09
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Vitenskapelig foredragMukherjee, Anjan; Ren, Dingding; Vullum, Per Erik; Huh, Junghwan; Fimland, Bjørn Ove Myking; Weman, Helge. (2022) Axial GaAs/AlGaAs Nanowire Solar Cell on Si with Ultra-High Power-per-Weight Ratio. MRS Spring Meeting III-V Semiconductors for Energy Conversion Technologies , Honolulu (remote) 2022-05-23 - 2022-05-27
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Populærvitenskapelig foredragWeman, Helge. (2022) Litt bakgrunn og historikk til opprinnelsen av CrayoNano. Styre NFR Muliggjørende teknologier Invitert til styremøte NFR Muliggjørende teknologier , Oslo (remote) 2022-04-06 - 2022-04-06
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PosterLi, Yang; Nilsen, Tron Arne; Liudi Mulyo, Andreas; Mukherjee, Anjan; Ren, Dingding; Weman, Helge. (2022) Selective area MBE growth of GaN nanowires on graphene/sapphire using a hole-patterned SiO2 mask. NTNU NANO The 1st TNNN Conference & Norwegian Nano Symposium 2022 , Trondheim 2022-11-30 - 2022-12-02
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Vitenskapelig foredragWeman, Helge. (2022) III-V nanowire/graphene hybrid structures for applications in solar cells and UV LEDs. Semiconductor Society of India (SSI) Invited talk at Int. symp. on Semiconductor Materials and Devices , Bhubaneswar (remote) 2022-12-16 - 2022-12-18
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PosterLi, Yang; Nilsen, Tron Arne; Liudi Mulyo, Andreas; Ren, Dingding; Weman, Helge; Fimland, Bjørn Ove Myking. (2022) Selective area epitaxy of GaN nanowires on single-layer graphene substrates by molecular beam epitaxy. Int. Workshop on Nitride Semiconductors , Berlin 2022-10-09 -
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Vitenskapelig foredragWeman, Helge. (2022) III-V nanowire/graphene hybrid structures for applications in solar cells and UV LEDs. EPFL-Lausanne Invited talk at EPFL , Lausanne 2022-06-13 - 2022-06-13
2021
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Vitenskapelig foredragWeman, Helge. (2021) AlGaN nanowire UV LEDs using graphene as substrate and transparent electrode. EPFL Invited talk "Quantum Science and Condensed Matter Seminar" , Lausanne 2021-06-25 - 2021-06-25
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IntervjuMukherjee, Anjan; Fimland, Bjørn-Ove; Weman, Helge. (2021) Gallium arsenide nanowire solar cell with 7.7% efficiency. pv-magazine.com pv-magazine.com [Internett] 2021-11-09
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IntervjuMukherjee, Anjan; Fimland, Bjørn-Ove; Weman, Helge. (2021) New ultra-high material efficient, low-cost solar cells — using nanowires. Eurekalert.org Eurekalert.org [Internett] 2021-11-05
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IntervjuMukherjee, Anjan; Fimland, Bjørn-Ove; Weman, Helge. (2021) New ultra-high material efficient, low-cost solar cells — using nanowires. https://norwegianscitechnews.com/ https://norwegianscitechnews.com/ [Internett] 2021-11-05
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Vitenskapelig foredragWeman, Helge. (2021) AlGaN nanowire UV LEDs using graphene as substrate and transparent electrode. MIT Invited talk "Epitaxy on 2D materials for layer release and their applications" , Virtual 2021-06-28 - 2021-06-30
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Populærvitenskapelig foredragWeman, Helge. (2021) Nanowire/graphene UVC LEDs. Timini NTNU NTNU Nanokveld , Trondheim 2021-04-19 - 2021-04-19
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Populærvitenskapelig foredragWeman, Helge. (2021) Litt bakgrunn og historikk til opprinnelsen av CrayoNano. IE fakultetet NTNU Feiring CrayoNano betaling av patenter fra NTNU , Trondheim 2021-12-22 - 2021-12-22
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Vitenskapelig foredragWeman, Helge. (2021) AlGaN nanowire UV LEDs using graphene as a transparent conducting substrate. Indian Institute of Technology Delhi Invited talk "The XXIst International Workshop on the Physics of Semiconductor Devices (IWPSD 2021)" , New Delhi and on-line 2021-12-14 - 2021-12-17
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Vitenskapelig foredragWeman, Helge. (2021) AlGaN nanowire UV LEDs using graphene as a transparent conducting substrate. China Solid State Lighting Alliance (CSA) Invited talk "The 7th International Forum on Wide Bandgap Semiconductors " , Shenzhen 2021-12-06 - 2021-12-08
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PosterLI, Yang; Nilsen, Tron Arne; Mukherjee, Anjan; Liudi Mulyo, Andreas; Fimland, Bjørn-Ove; Weman, Helge. (2021) Selective area growth of GaN nanowires on sapphire and graphene substrates by molecular beam epitaxy. CINVESTAV 21st International Conference on Molecular Beam Epitaxy , Puerto Vallarta and Virtual 2021-09-06 - 2021-09-09
2020
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Vitenskapelig foredragWeman, Helge. (2020) AlGaN nanowire UV LEDs using graphene as substrate and transparent electrode . Indian Institute of Technology Delhi Invited talk 5th International Conference on Emerging Electronics , New Delhi and on-line 2020-11-26 - 2020-11-28
2019
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PosterLiudi Mulyo, Andreas; Rajpalke, Mohana; Vullum, Per Erik; Weman, Helge; Kishino, Katsumi; Fimland, Bjørn-Ove. (2019) The influence of AlN buffer layer on the growth of self-assembled GaN nanocolumns on graphene. Scuola Normale Superiore and Istituto Nanoscienze-CNR Nanowire Week 2019 , Pisa 2019-09-23 - 2019-09-27
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Vitenskapelig foredragMukherjee, Anjan; Mosberg, Aleksander Buseth; Ren, Dingding; Li, Yang; Ahtapodov, Lyubomir; Van Helvoort, Antonius. (2019) Radial Junction GaAs Nanowire Solar Cells: Towards Efficient Performance. NanoNetwork 10th Annual NanoNetwork conference , Tromsø 2019-06-17 - 2019-06-19
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Vitenskapelig foredragLiudi Mulyo, Andreas; Kim, Dong Chul; Høiaas, Ida Marie; Ahtapodov, Lyubomir; Weman, Helge; Kishino, Katsumi. (2019) Utilization of Graphene as Substrate and Bottom Electrode for High-Density and Vertically-Aligned GaN/AlGaN Nanocolumns in Light-Emitting Diodes in the UV-A. 10th annual workshop on Norwegian PhD Network on Nanotechnology for Microsystems , Tromsø 2019-06-17 - 2019-06-19
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PosterLiudi Mulyo, Andreas; Rajpalke, Mohana Krishnappa; Vullum, Per Erik; Weman, Helge; Kishino, Katsumi; Fimland, Bjørn-Ove. (2019) The Influence of AlN Buffer Layer on the Growth of Self-Assembled GaN Nanocolumns on Graphene. Material Research Society The 13th International Conferences on Nitride Semiconductors , Bellevue, Washington (Seattle) 2019-07-07 - 2019-07-12
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PosterRen, Dingding; Chen, Z; Nilsen, Julie Stene; Ahtapodov, Lyubomir; Borisov, B.; Mukherjee, Anjan. (2019) Epitaxially Grown InGaN/GaN Nanowires on Graphene Glass. 13th International Conference on Nitride Semiconductors 2019 (ICNS-13) , Bellevue 2019-07-07 - 2019-07-12
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Vitenskapelig foredragNilsen, Julie Stene; Huh, Junghwan; Munshi, A Mazid; Dheeraj, Dasa; Weman, Helge; Fimland, Bjørn-Ove. (2019) Contacting nanostrusctures: detailed characterisation of the Au/Ge/GaAs nanowire interface. IoP Microscopy of Semiconducting Materials (MSM-XXI) , Cambridge 2019-04-09 - 2019-04-12
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Vitenskapelig foredragRen, Dingding; Ahtapodov, Lyubomir; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2019) Crystal phase engineering in GaAsSb/GaAs nanowires grown by MBE. DTU 1st International Workshop on Crystal-Phase Structures in Nanowires , Copenhagen 2019-04-04 - 2019-04-05
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PosterMosberg, Aleksander Buseth; Myklebost, Steinar; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Van Helvoort, Antonius. (2019) Characterizing nanowire arrays by computer vision based on SEM images. EMAS 16th European microbeam analysis society meeting , Trondheim 2019-05-19 - 2019-05-23
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Vitenskapelig foredragWeman, Helge. (2019) AlGaN nanowire UV LED using graphene as substrate and transparent bottom electrode. Beijing Graphene Insiitute Invited talk Beijing Graphene Institute , Beijing 2019-11-28 -
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Vitenskapelig foredragWeman, Helge. (2019) AlGaN nanowire UV LED using graphene as substrate and transparent bottom electrode . Neel Institute Invited talk at Neel Institute , Grenoble 2019-10-17 - 2019-10-17
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Vitenskapelig foredragWeman, Helge. (2019) AlGaN nanowire UV LED using graphene as substrate and transparent bottom electrode. China Solid State Lighting Alliance Invited talk 16th China International Forum on Solid State Lighting , Shenzhen 2019-11-25 - 2019-11-27
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Vitenskapelig foredragLiudi Mulyo, Andreas; Rajpalke, Mohana; Vullum, Per Erik; Weman, Helge; Kishino, Katsumi; Fimland, Bjørn-Ove. (2019) The influence of AlN buffer layer on the growth of self-assembled GaN nanocolumns on graphene. Nanowire week , Pisa 2019-09-23 - 2019-09-27
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Faglig foredragWeman, Helge. (2019) Using graphene as epitaxial substrate and transparent electrode for semiconductor devices . Phantoms Invited talk at Graphene 2019 , Rome 2019-06-25 - 2019-06-28
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IntervjuHøiaas, Ida Marie; Weman, Helge; Fimland, Bjørn-Ove. (2019) Ny og ufarlig elektronisk komponent kan erstatte kvikksølv. Teknisk Ukebald Teknisk Ukebald [Fagblad] 2019-05-28
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IntervjuHøiaas, Ida Marie; Weman, Helge; Fimland, Bjørn-Ove. (2019) New nanomaterial to replace mercury. Norwegian SciTech News Norwegian SciTech News [Internett] 2019-04-25
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IntervjuWeman, Helge. (2019) Scientists create ultraviolet light on a graphene surface. Nanowerk Nanowerk [Internett] 2019-05-23
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IntervjuWeman, Helge. (2019) Un nuevo nanomaterial reemplaza al mercurio para producir luz UVC. Europapress.es Europapress.es [Internett] 2019-04-26
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Populærvitenskapelig foredragWeman, Helge. (2019) Nanowire UV LEDs using graphene as substrate and transparent electrode. Nanoteknologistudiet NTNU Grey Goo Symposium , Trondheim 2019-02-14 - 2019-02-14
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IntervjuWeman, Helge. (2019) UV LEDs on graphene: Cheaper and ten times more efficient. eeNews eeNews [Internett] 2019-02-13
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IntervjuHøiaas, Ida Marie; Weman, Helge; Fimland, Bjørn-Ove. (2019) Utviklet nanomateriale som kan erstatte kvikksølv. Gemini.no Gemini.no [Internett] 2019-05-27
2018
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Vitenskapelig foredragWeman, Helge. (2018) III-V semiconductor nanowire/graphene hybrid structures and devices . NTNU NanoLab Invited talk at NTNU NanoLab Symposium 2018 , Trondheim 2018-11-28 - 2018-11-29
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PosterNylund, Inger-Emma; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Van Helvoort, Antonius. (2018) Electron microscopy characterization of GaN Nanowires grown on graphene. IFY&IMA CSI2018 , Trondheim 2018-06-19 - 2018-06-21
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PosterAhtapodov, Lyubomir; Munshi, A Mazid; Fimland, Bjørn-Ove; Van Helvoort, Antonius; Weman, Helge. (2018) Optical determination of the GaAs zinc blende/wurtzite band offsets. Nanowire Week 2018 , Hamilton 2018-06-11 - 2018-06-15
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PosterNilsen, Julie Stene; Ånes, Håkon Wiik; Andersen, Ingrid Marie; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove. (2018) Large Area Crystal Phase Mapping by Scanning Electron Diffraction and Machine Learning Data Analysis. CEN-DTU/Scandem Scandem 2018 , Copenhagen 2018-06-25 - 2018-06-28
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Vitenskapelig foredragWeman, Helge. (2018) Growth and Fabrication of III-V Nanowire/Graphene Hybrid Structures and Devices. NTT Invited talk at NTT Res. Lab, Atsugi, Japan , Morinosato 2018-09-14 - 2018-09-14
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Vitenskapelig foredragHøiaas, Ida Marie; Liudi Mulyo, Andreas; Vullum, Per Erik; Ahtapodov, Lyubomir; KIM, DONG CHUL; Fimland, Bjørn-Ove. (2018) Using graphene as substrate and transparent electrode in an GaN/AlGaN nanocolumn flip-chip UV LED. Nanowire Week , Hamilton 2018-06-11 - 2018-06-15
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Vitenskapelig foredragWeman, Helge. (2018) Using graphene as an epitaxial substrate and transparent electrode for GaN/AlGaN UV LEDs. Invited talk at Solid State Devices and Materials-Japan , Tokyo 2018-09-11 - 2018-09-13
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Vitenskapelig foredragWeman, Helge. (2018) III-V semiconductor nanowire/graphene hybrid structures and devices. TU Berlin Invited talk at Technical University of Berlin , Berlin 2018-01-22 - 2018-01-22
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Vitenskapelig foredragWeman, Helge. (2018) Using graphene as epitaxial substrate and transparent electrode for semiconductor devices. Beijing Graphene Institute (BGI) Invited talk at Beijing Graphene Forum and BGI Inauguration , Beijing 2018-10-25 - 2019-08-26
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PosterHøiaas, Ida Marie; Liudi Mulyo, Andreas; Vullum, Per Erik; Ahtapodov, Lyubomir; KIM, DONG CHUL; Fimland, Bjørn-Ove. (2018) GaN/AlGaN nanocolumn UV LED using graphene as substrate and transparent electrode. Int. Workshop on Nitride Semiconductors , Kanazawa 2018-11-11 - 2018-11-16
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Faglig foredragWeman, Helge. (2018) AlGaN nanowire UV LED using graphene as substrate and transparent electrode. Invited talk at Solid State Lighting-China 2018 , Shenzhen 2018-10-23 - 2018-10-25
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PosterLiudi Mulyo, Andreas; Rajpalke, Mohana Krishnappa; Kuroe, Haruhiko; Vullum, Per Erik; Weman, Helge; Fimland, Bjørn-Ove. (2018) Growth and characterization of GaN nanocolumns grown on graphene using a thin AlN buffer layer. International Workshop on Nitride Semiconductors (IWN2018) , Kanazawa 2018-11-11 - 2018-11-16
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IntervjuWeman, Helge; Fimland, Bjørn-Ove. (2018) Building Miniature Lasers with Nanowires. Science and technology research news Science and technology research news [Internett] 2018-08-24
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IntervjuWeman, Helge; Fimland, Bjørn-Ove. (2018) Building minature lasers with nanowires. Gemini.no Gemini.no [Internett] 2018-08-23
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IntervjuWeman, Helge. (2018) Vil revolusjnere UV LED markedet. NTNU Discovery årsrapport 2017 NTNU Discovery årsrapport 2017 [Tidsskrift] 2018-01-01
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IntervjuWeman, Helge; Fimland, Bjørn-Ove. (2018) Building miniature lasers using nanowire. Nanowerk.com Nanowerk.com [Internett] 2018-08-29
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IntervjuWeman, Helge; Fimland, Bjørn-Ove. (2018) Lager miniatyrlasere i nanotråder. Gemini.no Gemini.no [Internett] 2018-06-29
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PosterMunshi, Abdul Mazid; KIM, DONG CHUL; Heimdal, Carl Philip J; Heilmann, Martin; Christiansen, Silke; Vullum, Per Erik. (2018) Positioned-controlled growth of AlGaN nanopyramid arrays on graphene by metal-organic vapor phase epitaxy. Int. Workshop on Nitride Semiconductors , Kanazawa 2018-11-11 - 2018-11-16
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PosterMukherjee, Anjan; Ren, Dingding; Islam, M. A.; Mosberg, Aleksander Buseth; Li, Yang; Ahtapodov, Lyubomir. (2018) Monitoring Axial and Radial Junction GaAs Nanowire Solar Cells Through a New Approach: Towards Efficient Performance. NTNU NanoLab NTNU Nano Symposium , Trondheim 2018-11-28 - 2018-11-29
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Vitenskapelig foredragWeman, Helge. (2018) Growth and fabrication of III-V nanowire/graphene hybrid structures and devices. Invited talk at Nanowire Week , Hamilton 2018-06-11 - 2018-06-15
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Vitenskapelig foredragMukherjee, Anjan; Shin, Dong Hoon; Munshi, Abdul Mazid; Dheeraj, D.L.; Nam, Jung Tae; Kim, Keun Sook. (2018) Bias-dependent scanning photocurrent microscopy on embedded single GaAs nanowire/graphene hybrid device. Nanowire Week , Hamilton 2018-06-11 - 2018-06-15
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Vitenskapelig foredragWeman, Helge. (2018) Using graphene as epitaxial substrate and transparent electrode for AlGaN UV LEDs. Phantoms Foundation Invited talk at ImagineNano 2018 , Bilbao 2018-03-13 - 2018-03-15
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Vitenskapelig foredragRen, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, J.; Huh, Junghwan; Kim, Dong-Chul. (2018) Single Nanowire Laser with GaAsSb-based Multiple-Superlatticed Gain Structure. MIT Compound Semiconductor week 2018 , Boston 2018-05-29 - 2018-06-01
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Vitenskapelig foredragRen, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, J.; Gustafsson, A.; Huh, Junghwan. (2018) Single Nanowire Laser with GaAsSb-based Multiple-Superlatticed Gain Structure. UCSB 60th electronic materials conference at UCSB , Santa Barbara 2018-06-27 - 2018-06-29
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Vitenskapelig foredragMukherjee, Anjan; Shin, Dong Hoon; Munshi, Abdul Mazid; Dheeraj, Dasa; Nam, Jung Tae; Kim, Keun Sook. (2018) Bias-dependent Scanning Photocurrent Microscopy on a Single GaAs Nanowire Graphene Hybrid Device. NTNU Nano Symposium , Trondheim 2018-11-28 - 2018-11-29
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Intervju
2017
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Vitenskapelig foredragWeman, Helge. (2017) III-V semiconductor nanowire/graphene structures and photonic devices. Invited talk at Int. workshop on Physics of Semiconductor Devices , New Delhi 2017-12-11 - 2017-12-15
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PosterLiudi Mulyo, Andreas; Høiaas, Ida Marie; Rajpalke, Mohana Krishnappa; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2017) Graphene as a substrate and bottom electrode for high density and vertically aligned GaN nanocolumns. Nanolab NTNU Nano@NTNU Symposium , Trondheim 2017-12-06 - 2017-12-07
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Vitenskapelig foredragWeman, Helge. (2017) Epitaxial growth of heterostructured III-V semiconductor nanowires on graphene. Eindhoven TU Invited talk Erik Bakkers group, Eindhoven TU , Eindhoven 2017-05-02 - 2017-05-02
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Faglig foredragWeman, Helge. (2017) AlGaN nanostructures on graphene: A new disruptive technology for UV LEDs. LED Taiwan LED Taiwan 2017 , Taipei 2017-04-12 - 2017-04-12
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Vitenskapelig foredragWeman, Helge. (2017) Epitaxial growth of heterostructured III-V semiconductor nanowires on graphene. South China University Invited talk at South China University , Changsha 2017-04-19 - 2017-04-19
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Populærvitenskapelig foredragWeman, Helge. (2017) Changing the UV LED industry and beyond. NTNU TTO TTO vårslæpp , Trondheim 2017-06-07 - 2017-06-07
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Faglig foredragWeman, Helge. (2017) AlGaN nanowire flip-chip UV LEDs grown on graphene/glass. SSL China SSL China 2017 , Beijing 2017-11-01 - 2017-11-03
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Vitenskapelig foredragWeman, Helge. (2017) III-V semiconductor nanowire/graphene hybrid structures and devices. Beijing Graphene Institute Invited talk in prof. Zhongfan Liu-s group , Beijing 2017-10-31 - 2017-10-31
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Vitenskapelig foredragWeman, Helge. (2017) III-V semiconductor nanowire/graphene hybrid structures and devices. Uni. Michigan Invited talk in Prof. Zetian Mi's group Uni. Michigan , Ann Arbor 2017-10-16 - 2017-10-16
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PosterHøiaas, Ida Marie; Liudi Mulyo, Andreas; KIM, DONG CHUL; Fimland, Bjørn-Ove; Kishino, Katsumi; Weman, Helge. (2017) Graphene as growth substrate and transparent electrode for flip-chip GaN/AlGaN nanocolumn UV-LEDs. DTU, Danmark Carbonhagen 2017 , Copenhagen 2017-08-16 -
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Vitenskapelig foredragWeman, Helge. (2017) Epitaxial growth of semiconductor nanostructures on graphene. DTU, Danmark Carbonhagen 2017 , Copenhagen 2017-08-16 - 2017-08-17
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Vitenskapelig foredragWeman, Helge. (2017) Epitaxial growth of heterostructured III-V semiconductor nanowires on graphene. KIST Invited talk KIST, Korea , Jeonbuk 2017-04-10 - 2017-04-10
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PosterMukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Seo, Miri; Nam, Jungtae; Kim, Keun Sook. (2017) Single GaAs nanowire/graphene hybrid devices fabricated by a position controlled micro transfer and imprinting technique for embedded structures. MRS MRS Spring meeting 2017 , Phoenix 2017-04-17 - 2017-04-21
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PosterMukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Seo, Miri; Nam, Jungtae; Kim, Keun Sook. (2017) An Imprinting Technique to Fabricate Embedded Single GaAs Nanowire/Graphene Hybrid Devices . DTU, Danmark Carbonhagen 2017 , Copenhagen 2017-08-16 - 2017-08-17
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PosterMukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Seo, Miri; Kim, Keun Sook; Lee, Sang Wook. (2017) Embedded single GaAs nanowire/graphene hybrid devices fabricated by a position- controlled micro transfer and imprinting technique. Lund University Nanowire week , Lund 2017-05-29 - 2017-06-02
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Faglig foredragLiudi Mulyo, Andreas; Høiaas, Ida Marie; KIM, DONG CHUL; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2017) AlGaN/GaN Nanocolumn Flip-Chip UV LEDs Grown on Graphene/Silica Glass. The 11th International Symposium on Semiconductor Light Emitting Devices , Banff 2017-10-08 - 2017-10-12
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Faglig foredragLiudi Mulyo, Andreas; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2017) Epitaxial Growth of Vertical n-type GaN/AlGaN Nanocolumns on Graphene/Silica Glass. The 12th International Conferences on Nitride Semiconductors , Strasbourg 2017-07-24 - 2017-07-28
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Faglig foredragVan Helvoort, Antonius; Garmannslund, Andreas; Bogen, J; Nilsen, Julie Stene; Fauske, vidar T.; Ren, Dingding. (2017) Improved compositional mapping of heterostructured nanowire (by STEM-EDX). Lund University Nanowire Week , Lund 2017-05-29 - 2017-06-02
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PosterMosberg, Aleksander Buseth; Myklebost, S; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Van Helvoort, Antonius. (2017) Evaluating focused ion beam patterning for nanowire growth using computer vision. IoP/RMS EMAG/MMC , Manchester 2017-07-03 - 2017-07-06
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Faglig foredragFauske, vidar T.; Huh, Junghwan; Divitini, Giorgio; Munshi, A Mazid; Dheeraj, D.L.; Ducati, C. (2017) In-situ studying the heat‐induced replacement of GaAs by Au. LOT FRance/DENS Solutions In-situ TEM sample-management solution workshop , Grenoble 2017-03-16 - 2017-03-16
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PosterMosberg, Aleksander Buseth; Myklebost, S; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Van Helvoort, Antonius. (2017) Exploring focused ion beam substrate patterning for nanowire growth. Lund University Nanowire Week , Lund 2017-05-29 - 2017-06-02
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PosterRen, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, J.; Gustafsson, A; Huh, Junghwan. (2017) High-Q factor, single-mode, room-temperature lasing from GaAsSb/GaAs nanowire superlattices. Lund University Nanowire Week , Lund 2017-05-29 - 2017-06-02
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Vitenskapelig foredragWeman, Helge. (2017) III-V semiconductor nanowire/graphene hybrid structures and devices. NTNU Fredagkollokvie fysikk , Trondheim 2017-10-27 - 2017-10-27
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Vitenskapelig foredragWeman, Helge. (2017) III-V semiconductor nanowire/graphene structures and photonic devices. Albanova, KTH Invited talk at KTH , Stockholm 2017-10-25 - 2017-10-25
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Vitenskapelig foredragHøiaas, Ida Marie; Liudi Mulyo, Andreas; KIM, DONG CHUL; Fimland, Bjørn-Ove; Kishino, Katsumi; Weman, Helge. (2017) AlGaN/GaN nanowire flip-chip UV LED using graphene as substrate and transparent electrode. Nanolab NTNU og Nano Network Nano@NTNU , Trondheim 2017-12-06 - 2017-12-07
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Faglig foredragLiudi Mulyo, Andreas; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2017) Epitaxy Feasibility of n-type GaN/AlGaN Nanocolumns on Silica Glass. PDI Berlin Compound Semiconductor Week 2017 , Berlin 2017-05-14 - 2017-05-18
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PosterMukherjee, Anjan; KIM, DONG CHUL; Munshi, Mazid; Dasa, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2017) Fabrication of Single GaAs Nanowire/Graphene Hybrid Devices for Optoelectronic Applications. Nordic Nanolab User Meeting (NNUM) 2017 , Trondheim 2017-05-09 - 2017-05-10
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Vitenskapelig foredragMukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Seo, Miri; Nam, Jung Tae; Kim, Keun Soo. (2017) High-Quality Single GaAs Nanowire/Graphene Junctions Fabricated by using an Imprinting Technique for Embedded Nanowire Configurations. 8th Annual Workshop of the Norwegian PhD Network on Nanotechnology for Microsystems - 2017 , Bergen 2017-06-12 - 2017-06-14
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Vitenskapelig foredragRen, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, J.; Gustafsson, Anders; Huh, Junghwan. (2017) Ternary GaAsSb Nanowire for Optoelectronic Applications. NTNU NanoLab Nano@NTNU symposium 2017 , Trondheim 2017-12-06 - 2017-12-07
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Intervju
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IntervjuWeman, Helge. (2017) Gründerselskapet CrayoNano AS vil nå et etablere et pilotanlegg for utvikling av en ny type UV-LED i Trondheim. Gemini Gemini [Internett] 2017-06-15
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Intervju
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IntervjuWeman, Helge. (2017) UV LED av nanotråder på grafén. Elektronikknet Elektronikknet [Fagblad] 2017-06-28
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IntervjuWeman, Helge. (2017) Teknologiselskap henter 50 millioner og ny ledelse. Dagens Næringsliv Dagens Næringsliv [Avis] 2017-06-15
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IntervjuWeman, Helge. (2017) En reaktor blir installert i Trondheim. Den gror halvleder nanotråder til UV LED som dreper bakterier og desinfiserer. Teknisk Ukeblad Teknisk Ukeblad [Tidsskrift] 2017-08-27
2016
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Faglig foredragRen, Dingding; Dheeraj, D.L.; Jin, C; Nilsen, Julie Stene; Huh, Junghwan; Reinertsen, Johannes F. (2016) Self-catalyzed GaAsSb nanowires grown on silicon and graphene by molecular beam epitaxy: high-yield with stabilized crystal phase. NanoNetwork 7th NanoNetwork workshop , Trondheim 2016-06-13 - 2016-06-15
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Faglig foredragNilsen, Julie Stene; Huh, Junghwan; Munshi, A; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge. (2016) Characterization of Pd/Ge/Au contacts on GaAs Nanowires. Scandem 67th Scandem Meeting , Trondheim 2016-06-07 - 2016-06-10
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Faglig foredragRen, Dingding; Huh, Junghwan; Dheeraj, D.L.; Weman, Helge; Fimland, Bjørn-Ove. (2016) Gadiffusion Induced Morphological and Compositional Variations in SelfCatalyzed GaAsSb Nanowire Array. MRS 2016 Fall Meeting NM1: Semiconducting Nanowires, Nanoribbons and HeterostructuresSynthesis, Characterizations and Functional Devices , Boston 2016-11-27 - 2016-12-02
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PosterHøiaas, Ida Marie; KIM, DONG CHUL; Weman, Helge. (2016) Large-grained Si(111) crystalline thin film on graphene by aluminum-induced crystallization. Graphene 2016 , Genoa 2016-04-18 - 2016-04-22
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Faglig foredragWeman, Helge. (2016) AlGaN Nanowire/Graphene Deep UV LEDs. 13th China International Forum on Solid State Lighting (SSLCHINA 2016) , Beijing 2016-11-15 - 2016-11-17
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Faglig foredragWeman, Helge. (2016) Epitaxial growth of semiconductor nanostructures on graphene: A solution for UV LEDs . Graphene Canada 2016 , Montreal 2016-10-18 - 2016-10-20
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Vitenskapelig foredragLiudi Mulyo, Andreas; Konno, Yuta; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2016) Growth of Self-Organized Vertical GaN Nanocolumns Utilizing AlN as Nucleation Sites on Single Layer Graphene/Silica Glass by Molecular Beam Epitaxy. International Workshop on Nitride Semiconductors (IWN 2016) , Orlando 2016-10-02 - 2016-10-07
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PosterNilsen, Julie Stene; Mosberg, Aleksander Buseth; Garmannslund, Andreas; Reinertsen, Johannes F; Munshi, A Mazid; Dheeraj, D.L.. (2016) Self-Induced Compositional Variations in GaAs/AlGaAs Core-Shell Nanowires. EMS European Microscopy Congress 2016 , Lyon 2016-08-28 - 2016-09-02
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Vitenskapelig foredragNilsen, Julie Stene; Huh, Junghwan; Munshi, A Mazid; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge. (2016) Pd/Ge/Au contacts on GaAs Nanowires. NTNU NanoLab Nano@NTNU workshop , Trondheim 2016-11-17 - 2016-11-18
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Vitenskapelig foredragWeman, Helge. (2016) Epitaxial growth of semicondcutor nanowires on graphene. Invited talk in Prof. Bhattacharya's group, TIFR-Mumbai , Mumbai 2016-08-03 - 2016-08-03
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Faglig foredragRen, Dingding; Dheeraj, D.L.; Nilsen, Julie Stene; Huh, Junghwan; Van Helvoort, Antonius; Weman, Helge. (2016) Effects of Sb on Crystal Phase, Morphology and Optical Emission of Self-catalyzed GaAsSb Nanowires on Si(111) and Graphitic Substrates. 19th International Conference on Molecular Beam Epitaxy , Montpellier 2016-09-04 - 2016-09-09
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Faglig foredragWeman, Helge. (2016) Ultraviolet LEDs: A killer application for graphene?. 2nd Annual China International Graphene Summit , Shanghai 2016-01-20 - 2016-01-21
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Vitenskapelig foredragWeman, Helge. (2016) Epitaxial growth of heterostructured III-V semiconductor nanowires on graphene. Invited talk in Prof. Zetian Mi's and Thomas Szkopek's group, McGill University, Montreal , Montreal 2016-10-21 - 2016-10-21
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Faglig foredragWeman, Helge. (2016) Epitaxial growth of semiconductor nanostructures on graphene: Generic model and a potential first device application . NanoSpain 2016 , Logrono 2016-03-15 - 2016-03-18
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PosterKIM, DONG CHUL; Jungtae, Nam; Hoyeol, Yun; Seungjin, Nam; Jun Yeong, Hwang; Sang Wook, Lee. (2016) Chemical vapor deposition of graphene and its physisorption strain on Pt substrates. Carbonhagen 2016 , Copenhagen 2016-08-17 - 2016-08-18
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IntervjuWeman, Helge. (2016) Grafén – fremtidens superstoff. NITO Refleks NITO Refleks [Internett] 2016-01-18
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Faglig foredragLiudi Mulyo, Andreas; Konno, Yuta; Weman, Helge; Kishino, Katsumi. (2016) Self-Organized GaN Nanocolumns Grown on Silica Glass by RF-Molecular Beam Epitaxy. Japanese Physical Society Japanese Physical Society Spring Meeting , Tokyo 2016-03-19 - 2016-03-22
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PosterKIM, DONG CHUL; Jungtae, Nam; Hoyeol, Yun; Seungjin, Nam; Jun Yeong, Hwang; Sang Wook, Lee. (2016) Investigation of graphene growth on platinium by chemical vapor deposition. Graphene2016 , Genoa 2016-04-18 - 2016-04-22
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Vitenskapelig foredragWeman, Helge. (2016) III-V semiconductor nanowires grown on Si and graphene for optoelctronic applications. Invited talk in Prof. Kawakami's group, Kyoto University, Japan , Kyoto 2016-04-20 - 2016-04-20
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Faglig foredragLiudi Mulyo, Andreas; Konno, Yuta; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2016) Self-Organized Vertical GaN Nanocolumns Grown on Silica Glass by RF-Molecular Beam Epitaxy . 19th International Conference on Molecular Beam Epitaxy , Montpellier 2016-09-04 - 2016-09-09
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PosterMukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Munshi, Mazid; Dasa, Dheeraj; Fimland, Bjørn-Ove. (2016) Comparison Study of Bottom- & Top- Graphene/Single GaAs Nanowire Contacts for Optoelectronic Applications . The Nano NTNU Symposium 2016 , Trondheim 2016-11-17 - 2016-11-18
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Faglig foredragNilsen, Julie Stene; Huh, Junghwan; Munshi, A; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge. (2016) Transmission electron microscopy study of Pd/Ge/Au contacts to GaAs nanowires. NanoNetwork 7th NanoNetwork workshop , Trondheim 2016-06-13 - 2016-06-15
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Faglig foredragVan Helvoort, Antonius; Fauske, Vidar Tonaas; Huh, Junghwan; Divitini, G; Dheeraj, D.L.; Munshi, A. (2016) The kinetics and dynamics of Au-GaAs solid state replacements, studied by in situ TEM. DENS Dens preScandem Workshop , Trondheim 2016-06-07 - 2016-06-07
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PosterHøiaas, Ida Marie; KIM, DONG CHUL; Weman, Helge. (2016) Aluminum-induced crystallization of Si on graphene for optoelectronic devices. København Universitet og DTU Carbonhagen 2016 , København 2016-08-17 - 2016-08-18
2015
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IntervjuWeman, Helge. (2015) 단일 나노선 고효율 응용소자’ 개발 High-efficiency single nanowire device developed. ConsumerWide ConsumerWide [Internett] 2015-05-22
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IntervjuFimland, Bjørn-Ove; Weman, Helge. (2015) I verdenstoppen på nanoteknologi. Forskningsrådet FORNY Forskningsrådet FORNY [Internett] 2015-03-10
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Vitenskapelig foredragRen, Dingding; Dasa Lakshmi Narayana, Dheeraj; Huh, Junghwan; Reinertsen, Johannes F; Munshi, Abdul Mazid; Kim, Dong-Chul. (2015) High-yield Self-catalyzed GaAsSb/GaAs Heterostructured Nanowire Array on Si(111) by Molecular Beam Epitaxy. Nanowire Growth Workshop 2015 , Barcelona 2015-10-26 - 2015-10-30
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ProgramdeltagelseWeman, Helge. (2015) Grafén - framtidens vidundermateriale?. NRK Kunnskapskanalen NRK Kunnskapskanalen [TV] 2015-04-18
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Faglig foredragWeman, Helge. (2015) High-efficiency AlGaN nanowire/graphene deep UV LEDs. Semi, Taiwan LED Taiwan 2015 TechXPOT , Taipei 2015-03-25 - 2015-03-27
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IntervjuWeman, Helge. (2015) Nanordsun; Semiconductor nanowire-based solar cells. Solving the Climate Crisis- A Nordic Contribution Solving the Climate Crisis- A Nordic Contribution [Tidsskrift] 2015-09-01
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Vitenskapelig foredragWeman, Helge. (2015) III-V semiconductor nanowires on graphene for photonic applications. Chinese Academy of Science, Semiconductor Institute Invited talk in Prof. Zhiqiang Liu's group, State Key Lab on Solid State Lighting , Beijing 2015-11-08 - 2015-11-08
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Vitenskapelig foredragWeman, Helge. (2015) III-V semiconductor nanowiress grown on Si and graphene for photonic applications. Invited talk in Prof. Kishino's group, Sophia University, Tokyo , Tokyo 2015-02-16 - 2015-02-16
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Vitenskapelig foredragWeman, Helge. (2015) Epitaxial growth of semiconductor nanowires on graphene: Generic model and potential device applications . GeneExpression Systems Graphene Science Symposium , Boston 2015-09-21 - 2015-09-22
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Vitenskapelig foredragWeman, Helge. (2015) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited talk in Prof. Samuelson's group, Lund University, Sweden , Lund 2015-04-20 - 2015-04-20
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Populærvitenskapelig foredragWeman, Helge. (2015) Nanoteknologi. NTVA Teknologisprang for utvikling av havrommet , Trondheim 2015-09-09 - 2015-09-09
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Vitenskapelig foredragWeman, Helge. (2015) Epitaxial growth of semiconductor nanowires on graphene . 1st Int. Conf. on Graphene Technology , Aveiro 2015-07-20 - 2015-07-22
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Faglig foredragWeman, Helge. (2015) Selective-area growth of GaN/AlGaN nanostructures on graphene for high-efficiency deep UV LEDs. 12th China international forum on solid state lighting , Shenzhen 2015-11-02 - 2015-11-04
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PosterHuh, Junghwan; Yun, Hoyeol; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Lee, Sang Wook; Kim, Dong-Chul. (2015) Photocurrent Mapping of Single GaAsSb Nanowire Diodes. Nanowire Growth Workshop 2015 , Barcelona 2015-10-26 - 2015-10-30
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Populærvitenskapelig foredragWeman, Helge. (2015) Lysdioder. NTNU Invetert forelesning for 4e klasse Energi og Miljø , Trondheim 2015-09-28 - 2015-09-28
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PosterMunshi, Abdul Mazid; Ren, Dingding; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Aas, Lars Martin Sandvik; Van Helvoort, Antonius. (2015) On the growth of self-catalyzed GaAs nanowires on Si substrates: Opportunities and limitations. 31st North American Conference on Molecular Beam Epitaxy , Mayan Riviera 2015-10-04 - 2015-10-07
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Vitenskapelig foredragWeman, Helge. (2015) III-V semiconductor nanowires grown by MBE on silicon and graphene for photonic applications. Max Planck Inst. Invited talk in Prof. Silke Christiansen's group, Max Planck Inst., Erlangen , Erlangen 2015-01-16 - 2015-01-16
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IntervjuWeman, Helge. (2015) Grafén-Stoffenes Usain Bolt. NITO Refleks medlemsavis Høst 2015 NITO Refleks medlemsavis Høst 2015 [Tidsskrift] 2015-09-01
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Vitenskapelig foredragHeilmann, Martin; Munshi, Abdul Mazid; Tessarek, Christian; Sarau, George; Bashouti, Mohammad; Göbelt, Manuela. (2015) Metal-organic vapor phase epitaxy of GaN nanorods on graphene. 6th Int. symposium on growth of III-nitrides , Hamamatsu 2015-11-08 - 2015-11-13
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PosterRen, Dingding; Høiaas, Ida Marie; Reinertsen, Johannes F; Dasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Huh, Junghwan. (2015) Growth optimization for self-catalyzed GaAs nanowires on metal induced crystallized amorphous substrate. 31st North American Conference on Molecular Beam Epitaxy , Mayan Riviera 2015-10-04 - 2015-10-07
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IntervjuWeman, Helge. (2015) Materials Innovations Help LEDs Turn On. Photonics Spectra June 2015 Photonics Spectra June 2015 [Tidsskrift] 2015-06-01
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Intervju
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IntervjuWeman, Helge. (2015) Norske forskere vil utkonkurrere kvikksølv i vannrensing. Teknisk Ukeblad Teknisk Ukeblad [Tidsskrift] 2015-07-02
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IntervjuWeman, Helge. (2015) Ett steg nærmere grafénprodukter. Elektronikknett no.1 2015 Elektronikknett no.1 2015 [Fagblad] 2015-01-01
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IntervjuWeman, Helge. (2015) Nobelprisen i fysikk 2014. Fra fysikkens verden no.1 2015 Fra fysikkens verden no.1 2015 [Avis] 2015-01-01
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Faglig foredragWeman, Helge. (2015) Deep Ultraviolet LEDs: A killer Application for Graphene?. IDTechEx Graphene and 2D Materials , Berlin 2015-04-28 - 2015-04-29
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IntervjuFimland, Bjørn-Ove; Weman, Helge. (2015) Denne lager superstoff som kan forandre verden. Universitetsavisa Universitetsavisa [Avis] 2015-03-09
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PosterNilsen, Julie Stene; Reinertsen, Johannes F; Mosberg, Aleksander Buseth; Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj. (2015) Radial composition variations in the shells of GaAs/AlGaAs core-shell nanowires. NTNU NanoLab Nano@NTNU , Trondheim 2015-11-11 - 2015-11-11
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Faglig foredragHøiaas, Ida Marie; KIM, DONG CHUL; Weman, Helge. (2015) Silicon-graphene heterostructure for optoelectronic devices. Nano Network 7th Nanonetwork workshop , Trondheim 2015-06-13 - 2016-06-15
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Vitenskapelig foredragRen, Dingding; Dheeraj, D.L.; Huh, Junghwan; Reinertsen, Johannes F; Mazid, A. M.; Kim, Dong-Chul. (2015) High-yield self-catalyzed GaAsSb/GaAs heterostructured nanowire array on Si(111) by molecular beam epitaxy. NTNU NanoLab Nano@NTNU , Trondheim 2015-11-11 - 2015-11-11
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Faglig foredragWeman, Helge. (2015) Nanowire/Graphene UV LEDs . China Innovation Alliance of the Graphene Industry China Graphene Innovation Award , Wuxi 2015-09-05 - 2015-09-05
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IntervjuWeman, Helge. (2015) -Når vi lykkes, vil vi tjene store penger. Dagens Näringsliv Dagens Näringsliv [Avis] 2015-11-30
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PosterReinertsen, Johannes F; Nilsen, Julie Stene; Mosberg, Aleksander Buseth; Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj. (2015) Self-Induced Formation of Quantum Well Tubes in Self-Catalyzed GaAs/AlGaAs Core-Shell Nanowires. 582. WE-Heraeus-Seminar on III-V Nanowire Photonics , Bad Honnef 2015-03-22 - 2015-03-25
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PosterHøiaas, Ida Marie Eriksdatter; Ren, Dingding; KIM, DONG CHUL; Reinertsen, Johannes F; Fimland, Bjørn-Ove; Weman, Helge. (2015) GaAs Nanowire Growth on [111]-oriented Silicon with sub-grain Thickness. MyFab and NorFab user meeting , Lund 2015-04-21 - 2015-04-22
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PosterNilsen, Julie Stene; Reinertsen, Johannes F; Mosberg, Aleksander Buseth; Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj. (2015) Self-Induced Formation of Quantum Structures in the Shell of GaAs/AlGaAs Core-Shell Nanowires. NTNU NanoLab / MyFab Myfab/NorFab user meeting 2015 , Lund 2015-04-21 - 2015-04-22
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Vitenskapelig foredragFauske, Vidar Tonaas; Erlbeck, Maximilian; Huh, Junghwan; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj. (2015) In-situ electronic probing of semiconducting nanowires in an electron microscope. IoP/EMAG-group 19th Microscopy of Semiconducting Materials , Cambridge 2015-03-29 - 2015-04-02
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PosterHøiaas, Ida Marie Eriksdatter; Ren, Dingding; Reinertsen, Johannes F; KIM, DONG CHUL; Fimland, Bjørn-Ove; Weman, Helge. (2015) GaAs Nanowire Growth on [111]-oriented Silicon with sub-grain Thickness. Nano Network Nano Network Workshop , Oslo 2015-06-15 - 2015-06-17
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Vitenskapelig foredragNilsen, Julie Stene; Reinertsen, Johannes F; Mosberg, Aleksander Buseth; Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj. (2015) Compositional variations in the shells of GaAs/AlGaAs core-shell nanowires. RMS & IoP MMC/EMAG , Manchester 2015-06-29 - 2015-07-02
2014
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Vitenskapelig foredragWeman, Helge. (2014) III-V semiconductor nanowires@NTNU. NTNU Nanolab Nanolab 10th aniversium , Trondheim 2014-11-10 - 2014-11-11
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Populærvitenskapelig foredragWeman, Helge. (2014) Nobelprisen i fysikk 2014. GLØSHAUGENS AKADEMIKERE Årets Nobelpris i fysikk , Trondheim 2014-12-18 - 2014-12-18
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Populærvitenskapelig foredragWeman, Helge. (2014) Halvleder-nanotråder på grafén for neste generasjon IKT. NTNU Invetert forelesning for 1e klasse ELSYS , Trondheim 2014-11-22 - 2014-11-22
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Vitenskapelig foredragWeman, Helge. (2014) Towards low-cost, high-efficiency semiconductor nanowire/graphene solar cells. IIT Delhi & Oxford Instruments Bring the Nanoworld Together , New Delhi 2014-11-27 - 2014-11-28
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Reinertsen, Johannes F; Ahtapodov, Lyubomir; Lee, KD. (2014) Position controlled GaAs nanowires on 2-inch Si wafers using nanoimprint lithography. MRS MRS Spring Meeting , San Francisco 2014-04-22 - 2014-04-22
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Vitenskapelig foredragFauske, Vidar Tonaas; Huh, Junghwan; Erlbeck, Maximilian; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj. (2014) In-situ electronic probing of nanostructures in a FIB. NTNU Nanolab Nanolab 10th aniversium , Trondheim 2014-11-10 - 2014-11-11
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IntervjuWeman, Helge. (2014) Nanokunnskap gir supersolceller. Gemini.no og forskning.no Gemini.no og forskning.no [Internett] 2014-04-11
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Vitenskapelig foredragLim, Cheng Guan; Weman, Helge. (2014) Enhancing the Light-Matter Interactions in Radial p-n Junction Core-Shell Nanowires for Highly Efficient Nanowire Solar Cells. MRS 2014Spring Meeting , San Francisco 2014-04-21 - 2014-04-25
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Vitenskapelig foredragWeman, Helge. (2014) Towards low cost high efficiency semiconductor nanowire graphene solar cells. Invited talk: 1 st International Symposium on Energy Challenges and Mechanics , Aberdeen 2014-07-08 - 2014-07-10
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Vitenskapelig foredragWeman, Helge. (2014) How a Norwegian university project became the nanotech start-up CrayoNano. Invited talk :International Forum on the Nanotechnology Commercialization 2014" , Seoul 2014-06-11 - 2014-06-12
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PosterMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Ren, Dingding; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2014) Limitations of self-catalytic growth in controlling the diameter of GaAs nanowires on Si substrates. MBE2014 , Flagstaff 2014-09-07 - 2014-09-12
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IntervjuWeman, Helge. (2014) Grønt lys for en ny verden. Tekna Magasinet No.1 2014 Tekna Magasinet No.1 2014 [Tidsskrift] 2014-02-18
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IntervjuWeman, Helge. (2014) New physical phenomenon on nanowires seen for the first time. phys.org phys.org [Internett] 2014-04-14
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IntervjuWeman, Helge. (2014) Strain and light emission in gallium arsenide nanowires. Semiconductor-today.com Semiconductor-today.com [Tidsskrift] 2014-04-28
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IntervjuWeman, Helge. (2014) Better solar cells, better LED light and vast optical possibilities. Science Daily Science Daily [Internett] 2014-04-11
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IntervjuWeman, Helge. (2014) Better solar cells, better LED light and vast optical possibilities. phys.org phys.org [Internett] 2014-04-14
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IntervjuWeman, Helge. (2014) New physical phenomenon on nanowires seen for the first time. nanowerk.com nanowerk.com [Internett] 2014-04-11
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Intervju
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IntervjuWeman, Helge. (2014) Stress Activates Light-Emitting Nanowires. Photonics Photonics [Tidsskrift] 2014-04-23
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IntervjuWeman, Helge. (2014) Graphene and a modified structure of nanowires will improve solar cells and LED lighting. alternative-energies.net alternative-energies.net [Internett] 2014-04-18
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Vitenskapelig foredragWeman, Helge. (2014) Towards flexible high-efficiency semiconductor nanowire/graphene solar cells. Invited talk: Nanofair 2014 , Dresden 2014-07-01 - 2014-07-03
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Vitenskapelig foredragWeman, Helge. (2014) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited Seminar in Prof. Xiong Qihua's group at Nanyang Technical Univeristy, Singapore , Singapore 2014-03-12 - 2014-03-12
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PosterKauko, Hanne; Grieb, Tim; Munshi, Abdul Mazid; Müller, Knut; Weman, Helge; Rosenauer, A.. (2014) The outward diffusion of Sb during growth of antimonide III-V nanowires. 8th Nanowire Growth Workshop , Eindhoven 2014-08-25 - 2014-08-27
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Vitenskapelig foredragHuh, Junghwan; Yun, H.; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kauko, Hanne. (2014) GaAsSb nanowire diodes based on self-induced compositional variation. Nanowire2014 , Eindhoven 2014-08-25 - 2014-08-29
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Intervju
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Intervju
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Intervju
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PosterLim, Cheng Guan; Weman, Helge. (2014) Optimal Solar Cell Efficiency of Radial p-n Junction GaAs/AlGaAs Core-Shell Nanowire Arrays. EU PVSEC 2014 , Amsterdam 2014-09-22 - 2014-09-26
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Vitenskapelig foredragSignorello, G.; Lörtscher, E; Khomyakov, P.A.; Karg, S.; Dasa Lakshmi Narayana, Dheeraj; Gotsmann, B.. (2014) Inducing a Direct-to-Pseudodirect Bandgap Transition in Wurtzite GaAs Nanowires with Uniaxial Stress. MRS 2014Spring Meeting , San Francisco 2014-04-21 - 2014-04-25
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PosterMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Ren, Dingding; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2014) Limitations of self-catalytic growth in controlling the diameter of GaAs nanowires on Si substrates. Nanowire2014 , Eindhoven 2014-08-25 - 2014-08-29
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Vitenskapelig foredragSignorello, G.; Lörtscher, E; Khomyakov, P.A.; Karg, S.; Dasa Lakshmi Narayana, Dheeraj; Gotsmann, B.. (2014) Inducing a direct-to-pseudodirect bandgap transition in wutzite GaAs nanowires with uniaxial stress. Nanowire2014 , Eindhoven 2014-08-25 - 2014-08-29
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Intervju
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IntervjuWeman, Helge. (2014) Tuning a single nanowire improves solar cells and LEDs. nanowerk.com nanowerk.com [Internett] 2014-04-11
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IntervjuWeman, Helge. (2014) Nanowire light-emitting diodes. nanotechmag.com nanotechmag.com [Internett] 2014-04-10
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IntervjuWeman, Helge. (2014) IBM Combines Light Emission and Detection in Single Nanowire. IEEE Spectrum IEEE Spectrum [Tidsskrift] 2014-04-14
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IntervjuWeman, Helge. (2014) Tweaking nanowires boosts solar cell and LED outputs. optics.org optics.org [Internett] 2014-04-24
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Vitenskapelig foredragSvendsen, Guro Kristin; Skaar, Johannes; Weman, Helge; Dupertuis, M.-A.. (2014) Symmetries and optical transitions of hexagonal quantum dots in GaAs/AlGaAs nanowires. ICPS 2014 , Austin, Texas, USA 2014-08-10 - 2014-08-15
2013
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IntervjuWeman, Helge. (2013) Graphene and Semiconductor Technology Together: Smaller, Cheaper, Better. Science Daily Science Daily [Internett] 2013-06-11
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IntervjuWeman, Helge. (2013) Måtte holde teknologien hemmelig. Teknisk Ukeblad Teknisk Ukeblad [Internett] 2013-02-04
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IntervjuWeman, Helge. (2013) Mirakelmaterialet grafén vil føre til revolusjoner innen teknologi. Hardware.no Hardware.no [Internett] 2013-09-03
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Vitenskapelig foredragWeman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited talk at University of Copenhagen , Copenhagen 2013-11-01 - 2013-11-01
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Populærvitenskapelig foredragWeman, Helge. (2013) Grafén-og nanoblyanter. Arnfinn Stendahl Rokne, NTNU Kunnskapsbyen , Trondheim 2013-11-27 - 2013-11-27
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Vitenskapelig foredragHuh, Junghwan; KIM, DONG CHUL; Yun, H.; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kauko, Hanne. (2013) Electrical Characteristics of Individual GaAsSb Nanowires Grown by Molecular Beam Epitaxy. NTNU Nanolab 8th Nanolab usermeeting , Trondheim 2013-11-12 - 2013-11-12
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Populærvitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; KIM, DONG CHUL; Huh, Junghwan; Reinertsen, Johannes F; Ahtapodov, Lyubomir. (2013) Position Controlled GaAs Nanowires on Si using Nanoimprint Lithography. NTNU Nanolab 8th Nanolab usermeeting , Trondheim 2013-11-12 - 2013-11-12
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Vitenskapelig foredragWeman, Helge. (2013) III-V nanowire/graphene hybrid structures-A platform for future devices. NTNU Nanoscale communication technologies , Trondheim 2013-10-17 - 2013-10-17
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Faglig foredragWeman, Helge. (2013) II-V semiconductor nanowire project at NTNU. NTNU Nanolab and Rice University Norway-Texas meeting at NTNU , Trondheim 2013-10-15 - 2013-10-15
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Faglig foredragWeman, Helge. (2013) NaNordSun-Semiconductor Nanowire Based Solar Cells. Nordic Innovation Nordic Innovation meeting on Top-level Research Initiative , Copenhagen 2013-11-22 - 2013-11-22
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IntervjuWeman, Helge. (2013) Graphene and semiconductor technology together: smaller, cheaper, better. Forskningsrådet Forskningsrådet [Internett] 2013-05-30
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Intervju
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IntervjuWeman, Helge; Fimland, Bjørn-Ove; Kim, Dong-Chul. (2013) På vei mot noe stort. Forskningsrådet Forskningsrådet [Internett] 2013-05-15
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ProgramdeltagelseWeman, Helge; Fimland, Bjørn-Ove; Kim, Dong-Chul. (2013) Grafén-Forbløffende superstoff. NRK Schrödingers katt NRK Schrödingers katt [TV] 2013-03-14
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IntervjuWeman, Helge. (2013) Grafén – supermateriale som vil revolusjonere fremtidens datamaskin. IKT nytt IKT nytt [Internett] 2013-07-13
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IntervjuWeman, Helge. (2013) Grafen forstærker lysets kraft. Videnskap DK Videnskap DK [Internett] 2013-04-01
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Vitenskapelig foredragWeman, Helge. (2013) Epitaxial growth of vertical III-V semiconductor nanowires on graphene. The Collaborative Conference on Crystal Growth , Cancun 2013-06-10 - 2013-06-13
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Vitenskapelig foredragWeman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene substrates for photonic applications. Invited talk in Prof. Yong-Hee Lee's group at Sungkyunkwan University , Suwon 2013-03-19 - 2013-03-19
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PosterLim, Cheng Guan; Weman, Helge. (2013) Design guidelines for radial p-n junction GaAs/AlGaAs core-shell nanowire solar cells. Nanowires-2013 , Rehovot 2013-11-12 - 2013-11-15
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Vitenskapelig foredragWeman, Helge. (2013) Heterostructured III-V nanowires grown by molecular beam epitaxy on Si and graphene substrates. Invited talk in Prof. Yapin Dang's group at Jia Tong University , Shanghai 2013-03-13 - 2013-03-13
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Vitenskapelig foredragWeman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited talk in Xiamin Ren's group at Beijing University of Posts and Telecommunications , Beijing 2013-03-22 - 2013-03-22
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Vitenskapelig foredragWeman, Helge. (2013) Heterostructured III-V nanowires grown by molecular beam epitaxy on Si and graphene substrates. Invited talk in Prof. Wei Lu's group at Shanghai Institute of Technical Physics, , Shanghai 2013-03-12 - 2013-03-12
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Vitenskapelig foredragWeman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene for solar cell applications. Invited talk in Prof. Hingwei Zhu's group at Tsinghua University , Beijing 2013-03-22 - 2013-03-22
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Vitenskapelig foredragHuh, Junghwan; Kim, Dong-Chul; Yun, H.; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kauko, Hanne. (2013) Effects on compositional variation on the electrical property of GaAsSb nanowires. MRS MRS 2013 Fall Meeting , Boston 2013-12-02 - 2013-12-06
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PosterAhtapodov, Lyubomir; Kauko, Hanne; Munshi, Abdul Mazid; Fimland, Bjørn-Ove; Van Helvoort, Antonius; Weman, Helge. (2013) Optical properties of self-catalyzed GaAs Nanowires with axial GaAsSb inserts. Nanowires-2013 , Rehovot 2013-11-12 - 2013-11-15
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PosterNam, J.; Kim, Dong-Chul; Andersen, P.C.; Park, S.J.; Dae, D.J.; Munshi, Abdul Mazid. (2013) Synthesis and characterization of graphene on Pt using CVD. Korean Physical Society Spring Meeting , Daejon 2013-04-24 - 2013-04-26
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PosterGhalamestani, Sepideh Gorji; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Dick, Kimberly A. (2013) Self-catalyzed MBE grown GaAs/GaAsSb core-shell nanowires in ZB and WZ crystal structures. 7th Nanowire Growth Workshop , Lausanne 2013-06-10 - 2013-06-12
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Vitenskapelig foredragLim, Cheng Guan; Weman, Helge. (2013) Numerical Analysis and Device Optimization of Radial p-n Junction GaAs/AlGaAs Core-Shell Nanowire Solar Cells. 13th Int. Conf. on Numerical Simulations of Optoelectronic Devices , Vancouver 2013-08-19 - 2013-08-22
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Vitenskapelig foredragWeman, Helge. (2013) Semiconductor nanowires grown on graphene. 4th annual NanoNetwork Workshop , Bergen 2013-06-17 - 2013-06-19
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Vitenskapelig foredragWeman, Helge. (2013) Epitaxial growth of semiconductor nanowires on graphene:Generic model and potential device applications. Physical Sciences Symposia – 2013 on ‘Crystal & Graphene Science , Boston 2013-09-04 - 2013-09-05
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PosterHuh, Junghwan; Kim, Dong-Chul; Yun, H.; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kim, G.T.. (2013) Electrical properties of III-V semiconductor nanowires for solar cell applications. 4th Annual Nanonetwork Workshop , Bergen 2013-06-17 - 2013-06-19
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Vitenskapelig foredragWeman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited talk in Prof. Jianhua Zhao's group at Inst. of Semiconductors Chinese Academy of Sciences , Beijing 2013-03-25 - 2013-03-25
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PosterKauko, Hanne; Munshi, Abdul Mazid; Lim, Cheng Guan; KIM, DONG CHUL; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove. (2013) GaAs/AlGaAs core-shell nanowires for novel solar cell applications. NRF Nanokonferansen 2013 , Oslo 2013-03-18 - 2013-03-18
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PosterKauko, Hanne; Munshi, Abdul Mazid; Lim, Cheng Guan; KIM, DONG CHUL; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove. (2013) GaAs/AlGaAs core-shell nanowires for novel solar cell applications. FME sol Norwegian Solar Cell Conferance 2013 , Oppdal 2013-03-13 - 2013-03-15
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Vitenskapelig foredragAhtapodov, Lyubomir; Todorovic, Jelena; Reinertsen, Johannes F; Dasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Van Helvoort, Antonius. (2013) Optical Characterization of Single Semiconductor Nanowires. Myfab og Norfab MYFAB&NORFAB Meetting , Uppsala 2013-04-17 - 2013-04-18
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PosterDasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Fauske, Vidar Tonaas; KIM, DONG CHUL; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2013) Epitaxial growth of vertical III-V semiconductor nanowires on graphene. Graphene2013 , Bilbao 2013-04-23 - 2013-04-26
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Vitenskapelig foredragFauske, Vidar Tonaas; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2013) In-situ electrical and structural characterization of individual GaAs nanowire. IoP-EMAG EMAG2013 , York 2013-09-02 - 2013-09-06
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PosterDasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Fauske, Vidar Tonaas; KIM, DONG CHUL; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2013) Epitaxial growth and characterization of vertical III-V semiconductor nanowires on graphene. 7th Nanowire Growth Workshop , Lausanne 2013-06-10 - 2013-06-12
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PosterMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2013) Limitations of self-catalytic growth in controlling diameter of GaAs nanowires on Si substrates. 7th Nanowire Growth Workshop , Lausanne 2013-06-10 - 2013-06-12
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PosterMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; KIM, DONG CHUL; Todorovic, Jelena; Huh, Junghwan. (2013) GaAs nanowires grown on silicon and graphene for solar cell application. Nanonetwork 4th annual NanoNetwork Workshop , Bergen 2013-06-17 - 2013-06-19
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PosterKauko, Hanne; Munshi, Abdul Mazid; Lim, Cheng Guan; KIM, DONG CHUL; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove. (2013) Novel solar cells based on GaAs/AlGaAs core-shell nanowires. Nanonetwork 4th annual Nanonetwork workshop , Bergen 2013-06-17 - 2013-06-19
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Vitenskapelig foredragFauske, Vidar Tonaas; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2013) Mechanical and electrical characterization of nanowire-substrate interfaces. Nanonetwork 4th Annual Nanonetwork Workshop , Bergen 2013-06-17 - 2013-06-19
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PosterFauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; KIM, DONG CHUL; Fimland, Bjørn-Ove; Weman, Helge. (2013) Site-specific, cross-sectional TEM samples of as-grown nanowires by FIB. NorFab/MyFab NorfFab/MyFab user meeting , Uppsala 2013-04-17 - 2013-04-18
2012
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Vitenskapelig foredragAhtapodov, Lyubomir; Olk, Phillip; Todorovic, Jelena; Mjåland, Terje Sund; Slåttnes, Patrick Rene Tollefsen; Dasa Lakshmi Narayana, Dheeraj. (2012) Combined micro-photoluminescence and electron microscopy investigation of single GaAs nanowires. ICPS2012 , Zurich 2012-07-29 - 2012-08-03
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PosterFauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kim, Dong Chul; Fimland, Bjørn-Ove; Weman, Helge. (2012) Characterization of the Interface between GaAs Nanowires and a 111-Si Substrate. MRS MRS 2012 Spring Meeting , San Francisco 2012-04-09 - 2012-04-13
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kim, Dong Chul; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2012) Zinc blende and wurtzite GaAs nanowires grown by self-catalyzed molecular beam epitaxy. MRS MRS 2012 Spring Meeting , San Francisco 2012-04-09 - 2012-04-13
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Vitenskapelig foredragKim, Dong Chul; Ahtapodov, Lyubomir; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2012) Photocurrent study of Single Wurtzite AlGaAs-GaAs Core/shell nanowires. MRS MRS 2012 Spring Meeting , San Francisco 2012-04-09 - 2012-04-13
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Vitenskapelig foredragKim, Dong Chul; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Lim, Cheng Guan; Fauske, Vidar Tonaas; Van Helvoort, Antonius. (2012) Semiconductor Nanowire Based Solar Cells-A Nordic Top-level Research Initiative. Technoporten , Trondheim 2012-04-16 - 2012-04-18
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Vitenskapelig foredragAhtapodov, Lyubomir; Todorovic, Jelena; Olk, Phillip; Kim, Dong Chul; mjaaland, T.S.; Eriksson, M. (2012) Wurtzite versus Zincblende GaAs – A Thorough Comparison. MRS 2012 Spring Meeting , San Francisco 2012-04-09 - 2012-04-13
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2012) GaAs nanowires grown on Si substrates: Crystal phase perfection, heterostructures and position control. Nano-network 3rd Nano-network Workshop , Trondheim 2012-06-11 - 2012-06-11
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Vitenskapelig foredragTodorovic, Jelena; Anthonysamy, Fervin Moses; Ahtapodov, Lyubomir; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2012) Correlation of optical and structural properties of single semiconductor heterostructured nanowires. Scandem Scandem 2012 , Bergen 2012-06-13 - 2012-06-15
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Vitenskapelig foredragFauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kim, Dong Chul; Fimland, Bjørn-Ove; Weman, Helge. (2012) Transmission Electron Microscopy Study of Defects at the Interface between GaAs Nanowires and a Si-111 Substrate. Nano-network 3rd Nano-network Workshop , Trondheim 2012-06-11 - 2012-06-13
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PosterAhtapodov, Lyubomir; Todorovic, Jelena; Olk, Phillip; mjaaland, T.S.; Slaattnes, P.R.T.; Dasa Lakshmi Narayana, Dheeraj. (2012) Optical Characterization of Single GaAs/AlGaAs Nanowires with Combined Photoluminescence Spectroscopy and Transmission Electron Microscopy on the Same Nanowire. Nano-network 3rd Nano-network Workshop , Trondheim 2012-06-11 - 2012-06-13
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PosterFauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; DONG CHUL, KIM; Fimland, Bjørn-Ove; Weman, Helge. (2012) Site-specific, cross-sectional TEM samples of as-grown nanowires by FIB. EMC 15th EMC , Manchester 2012-09-16 - 2012-09-21
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Vitenskapelig foredragWeman, Helge. (2012) III-V nanowires for high-efficiency solar cells. Transatlantic Science Week. Invited talk at "Nano-enabling technologies" , Houston 2012-11-14 - 2012-11-14
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IntervjuWeman, Helge. (2012) Researchers claim semiconductors grown on graphene. EE times EE times [Internett] 2012-09-10
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Intervju
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IntervjuWeman, Helge. (2012) Scientists create ultra-thin, cheap, flexible, transparent graphene semiconductors. Gizmag Gizmag [Internett] 2012-09-28
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IntervjuWeman, Helge. (2012) Graphene Replaces Traditional Silicon Substrates in Future Devices. IEEE Spectrum IEEE Spectrum [Internett] 2012-09-28
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IntervjuWeman, Helge; Fimland, Bjørn-Ove. (2012) De kan revolusjonere verdens datateknologi. Bergens Tidene Bergens Tidene [Internett] 2012-12-02
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Vitenskapelig foredragWeman, Helge. (2012) Heterostructured III-V semiconductor nanowires grown by Au and self-catalyzed MBE. Invited talk in Prof. Fukui's group at Hokkaido University, Sapporo , Sapporo 2012-10-01 - 2012-10-01
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Populærvitenskapelig foredragWeman, Helge. (2012) Semiconductor nanowires on graphene for next generation ICT. IME NTNU ITovation day 2012 2012-11-27 - 2012-11-27
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Vitenskapelig foredragWeman, Helge. (2012) Heterostructured III-V semiconductor nanowires grown by Au and self-catalyzed MBE. Invited talk in Dr.Notomi's group at NTT Basic Res. Lab, Atsugi 2012-10-03 - 2012-10-03
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Vitenskapelig foredragWeman, Helge. (2012) Heterostructured III-V semiconductor nanowires grown by Au and self-catalyzed MBE. Invited talk in Prof. Yi's group at Seoul National University 2012-10-05 - 2012-10-05
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IntervjuWeman, Helge; Fimland, Bjørn-Ove. (2012) NTNU-oppdagelse kan revolusjonere elektronikkbransjen. Adressa Adressa [Avis] 2012-09-11
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IntervjuWeman, Helge; Fimland, Bjørn-Ove. (2012) De kan revolusjonere verdens datateknologi. Aftenposten Aftenposten [Avis] 2012-12-02
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Populærvitenskapelig foredragWeman, Helge. (2012) Commercialisation of Nanotechnology. NordForsk Annual Top level Research program meeting 2012 , Helsinki 2012-10-29 - 2012-10-30
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Vitenskapelig foredragWeman, Helge. (2012) Heterostructured III-V nanowires grown by molecular beam epitaxy for photonic applications. Invited talk in Prof. Ruoff's group at University of Texas, Austin 2012-11-12 - 2012-11-12
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IntervjuWeman, Helge. (2012) NTNU-gjennombrudd for nanotråder på grafen. Digi.no Digi.no [Internett] 2012-09-11
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IntervjuWeman, Helge. (2012) Supertynt stoff kan strupe solindustrien. Dagens Næringsliv Dagens Næringsliv [Avis] 2012-09-11
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PosterKim, Dong-Chul; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2012) Investigation of wurtzite GaAs nanowires by polarization dependent photocurrent spectroscopy. ICPS 2012 , Zurich 2012-07-29 - 2012-08-03
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IntervjuWeman, Helge; Fimland, Bjørn-Ove. (2012) Nanohalvledere på grafen revolutionerer solcellers effektivitet. Ingenjøren Ingenjøren [Avis] 2012-10-20
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Vitenskapelig foredragAhtapodov, Lyubomir; Snustad, Ingrid; Gulla, Stian; Munshi, Abdul Mazid; Fimland, Bjørn-Ove; Van Helvoort, Antonius. (2012) Correlated micro photoluminescence and transmission electron microscopy on single self‐assisted GaAs/AlGaAs core‐shell nanowires. NTNU Nanolab 7th Nanolab usermeeting , Trondheim 2012-12-12 - 2012-12-12
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PosterFauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; DONG CHUL, KIM; Fimland, Bjørn-Ove; Weman, Helge. (2012) FIB prepared site-specific cross-sectional TEM specimen of nanowire-substrate interfaces. NTNU Nanolab 7th Nanolab usermeeting , Trondheim 2012-12-12 - 2012-12-12
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; DONG CHUL, KIM; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2012) Epitaxial growth of semiconductor III-V nanowires on graphene: A template for future opto-electronic device applications. NTNU Nanolab 7th Nanolab usermeeting , Trondheim 2012-12-12 - 2012-12-12
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Vitenskapelig foredragWeman, Helge. (2012) Heterostructured III-V nanowires grown by MBE. Invited Seminar in Prof. Xianfen Duan's group at UCLA , UCLA 2012-04-16 - 2012-04-16
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Vitenskapelig foredragDasa Lakshmi Narayana, Dheeraj; DONG CHUL, KIM; Munshi, Abdul Mazid; Lim, Cheng Guan; Fauske, Vidar Tonaas; Van Helvoort, Antonius. (2012) III-V semiconductor nanowire based solar cells. Turid Worren Reenaas Mini‐workshop on materials for solar cells and other optoelectronic applications , NTNU, Trondheim 2012-09-11 -
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Vitenskapelig foredragWeman, Helge. (2012) Heterostructured III-V semiconductor nanowires for solar cell applications. Department of Physics, Konkuk University Invited Seminar in Prof. SangWook Lee's group at Kunkuk Uni, Seoul , Seoul 2012-05-15 - 2012-05-15
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Vitenskapelig foredragWeman, Helge. (2012) III-V Nanowire Solar Cells. Solar United Invited talk at 2012 meeting of The Norwegian Research Centre for Solar Cell Technology , Trondheim 2012-05-23 - 2012-05-23
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; DONG CHUL, KIM; Todorovic, Jelena; Fauske, Vidar Tonaas; Van Helvoort, Antonius. (2012) Self-catalyzed GaAs nanowires grown by molecular beam epitaxy. Turid Worren Reenaas Mini‐workshop on materials for solar cells and other optoelectronic applications , NTNU, Trondheim 2012-09-11 -
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Populærvitenskapelig foredragWeman, Helge. (2012) Halvleder nanotråder. NTNU/Catharina De Lange Davies Innovasjon Norge (medisin) besöker Trondheim , Trondheim 2012-06-28 - 2012-06-28
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Populærvitenskapelig foredragWeman, Helge. (2012) Nanoteknologi- Vad er det?. Luftkrigsskolen, Trondheim Luftkrigsskolen, Trondheim , Trondheim 2012-01-17 - 2012-01-17
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PosterDasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Christoffersen, Ole Morten; DONG CHUL, KIM; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2012) Growth and characterization of Be-doped GaAs nanowires grown by Au- and Ga-assisted molecular beam epitaxy. MBE2012 , Nara 2012-09-23 - 2012-09-28
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2012) Crystal phase tuning in self-catalyzed GaAs nanowires induced by Ga-droplet contact angle. MBE2012 , Nara 2012-09-23 - 2012-09-28
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; DONG CHUL, KIM; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2012) A generic model and experimental demonstration of epitaxial growth of GaAs nanowires on graphene layers. MBE2012 , Nara 2012-09-23 - 2012-09-28
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; DONG CHUL, KIM; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2012) Epitaxial Growth of High Quality Vertical GaAs Nanowires on Graphene by Molecular Beam Epitaxy. MRS MRS Autumn meeting , Boston 2012-11-25 - 2012-11-25
2011
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Vitenskapelig foredragWeman, Helge. (2011) Invited seminar on "Heterostructured III-V nanowires grown byAu-assisted molecular beam epitaxy". WE Heraeus Stiftung, Tysklland Heraeus seminar on III-V Nanowires , Bad Honnef 2011-02-21 - 2011-02-23
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PosterAhtapodov, Lyubomir; Kim, D.C.; Boe, A.B.; Choi, J.W.; Ji, H.; Kim, G. T.. (2011) Photocurrent spectroscopy of single wurtzite GaAs nanowires. WE Heraeus Stiftung, Tysklland Heraeus seminar on III-V Nanowires , Bad Honnef 2011-02-21 - 2011-02-23
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Vitenskapelig foredragAnthonysamy, Fervin Moses; Todorovic, Jelena; Dasa Lakshmi Narayana, Dheeraj; Olk, Phillip; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2011) Consecutive optical and structural characterization of a single heterostructured III-V semiconductor nanowire. 2nd Nano-network Workshop , Oslo 2011-06-15 - 2011-06-17
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Vitenskapelig foredragTodorovic, Jelena; Anthonysamy, Fervin Moses; Dasa Lakshmi Narayana, Dheeraj; Olk, Phillip; Fimland, Bjørn-Ove; Weman, Helge. (2011) Correlated micro-photoluminescence and electron microscopy study of a heterostructured semiconductor nanowire. IoP Microscopy of Semiconducting Materials 2011 (MSM XVII) , Cambridge 2011-04-04 - 2011-04-04
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PosterMunshi, Abdul Mazid; Kim, D.C.; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2011) Positioned self-catalyzed GaAs nanowire arrays on Si substrates grown by molecular beam epitaxy. Nano-network Workshop , Oslo 2011-06-15 - 2011-06-15
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PosterMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2011) Insights into Growth Mechanisms of Self-catalyzed GaAs Nanowires Grown by Molecular Beam Epitaxy. MRS MRS Spring Meeting , San Francisco 2011-04-25 - 2011-04-29
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Vitenskapelig foredragAnthonysamy, Fervin Moses; Todorovic, Jelena; karlberg, Thomas; Van Helvoort, Antonius; Dasa Lakshmi Narayana, Dheeraj; Olk, Phillip. (2011) Consecutive Photoluminescence and Transmission Electron Microscopy Studies of Single GaAs/AlGaAs Core-shell Nanowires with a GaAsSb Insert. MRS MRS Spring meeting 2011 , San Francisco 2011-04-25 - 2011-04-29
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Vitenskapelig foredragFauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; DONG CHUL, KIM; Fimland, Bjørn-Ove; Weman, Helge. (2011) Cross-sectional Electron Microscopy characterization of the interface between GaAs Nanowires and a Si Substrate. NTNU Nanolab 6th Nanolab usermeeting , Trondheim 2011-11-16 - 2011-11-16
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Vitenskapelig foredragAhtapodov, Lyubomir; Olk, Phillip; Todorovic, Jelena; Mjåland, Terje Sund; Dasa Lakshmi Narayana, Dheeraj; Van Helvoort, Antonius. (2011) Optical characterization of single semiconductor nanowires. NTNU NanoLab 6th NanoLab user meeting , Trondheim 2011-11-16 - 2011-11-16
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Populærvitenskapelig foredragWeman, Helge. (2011) Guest seminar at Sungkyunkwan (Samsung) University: Nanotechnology at NTNU. Sungkyunkwan (Samsung) University Nanostudent excursion to Korea 2011 , Suwon 2011-04-27 - 2011-04-27
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Vitenskapelig foredragWeman, Helge. (2011) Invited seminar: III-V nanowires for high-efficiency solar cells. Norway-China Workshop on Nanotechnology for renewable energy materials , Trondheim 2011-08-31 - 2011-09-01
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Populærvitenskapelig foredragWeman, Helge. (2011) Guest seminar at POSTECH: Nanotechnology at NTNU. Dept. of Physics, POSTECH Nanostudent excursion to Korea 2011 , Pohang 2011-04-21 - 2011-04-21
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Vitenskapelig foredragWeman, Helge. (2011) Semiconductor nanowire based solar cells-A Nordic top-level research initiative. 24th Nordic semiconductor meeting , Fuglsøcenter 2011-06-19 - 2011-06-22
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; DONG CHUL, KIM; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2011) Periodic arrays of self-catalyzed heterostructured GaAs nanowires on Si substrates grown by molecular beam epitaxy. CNRS GDR Semiconductor Nanowires and Nanotubes , Porquerolles 2011-10-17 - 2011-10-21
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Vitenskapelig foredragWeman, Helge. (2011) Invited seminar: Heterostructured III-V nanowires grown by MBE. IBM Zurich Research Lab. IBM seminar series , Rueschlikon 2011-01-19 - 2011-01-19
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Vitenskapelig foredragAhtapodov, Lyubomir; Olk, Phillip; Todorovic, Jelena; Ericsson, M.; Dasa Lakshmi Narayana, Dheeraj; Van Helvoort, Antonius. (2011) Optical properties of Wurtzite GaAs nanowires. CNRS GDR Semiconductor Nanowires and Nanotubes , Porquerolles 2011-10-17 - 2011-10-21
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Vitenskapelig foredragWeman, Helge. (2011) Invited seminar: Heterostrucured III-V nanowires grown by Au- and self-assisted molecular beam epitaxy. PDI PDI Topical Workshop on MBE-grown arsenide nanowires , Berlin 2011-09-08 - 2011-09-09
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Vitenskapelig foredragOlk, Phillip; Härtling, Thomas; DONG CHUL, KIM; Weman, Helge. (2011) All-optical contacting of single nanowires by confocal photodeposition of metal. Materials Research Society Materials Res. Soc. 2011 Fall Meeting, Symposium BB: Functional Nanowires and Nanotubes , Boston 2011-11-27 - 2011-12-02
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Vitenskapelig foredragMunshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; DONG CHUL, KIM; Todorovic, Jelena; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2011) Crystal phase and position control of self-catalyzed GaAs nanowires grown on a Si substrate. NTNU NanoLab 6th NanoLab user meeting , Trondheim 2011-11-16 - 2011-11-16
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Vitenskapelig foredragDONG CHUL, KIM; Christoffersen, Ole Morten; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Ahtapodov, Lyubomir; Fimland, Bjørn-Ove. (2011) Nanofabrication of GaAs nanowire optoelectronic devices in NTNU NanoLab. NTNU NanoLab 6th NanoLab user meeting , Trondheim 2011-11-16 - 2011-11-16
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Populærvitenskapelig foredragWeman, Helge. (2011) Guest seminar at Korea University: Nanotechnology at NTNU. Korea University Nanostudent excursion to Korea 2011 , Seoul 2011-04-26 - 2011-04-26
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Populærvitenskapelig foredragWeman, Helge. (2011) Guest seminar at KAIST: Nanotechnology at NTNU. KAIST NTNU-KAIST nanotechnology workshop , Taejon 2011-04-22 - 2011-04-22
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Vitenskapelig foredragWeigand, Christian Carl; Skåre, Daniel; Tveit, Johannes; Ladam, Cecile; Holmestad, Randi; Grepstad, Jostein. (2011) Growth of ZnO nanostructures on c- and a-plane sapphire by Au-assisted pulsed laser deposition. CNRS GDR Semiconductor Nanowires and Nanotubes , Porquerolles 2011-10-17 - 2011-10-21
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PosterDONG CHUL, KIM; Ahtapodov, Lyubomir; Boe, A.B.; Choi, J.W.; Kim, G. T.; Ji, H. (2011) Photocurrent spectroscopy of single wurtzite GaAs nanowires. Heraeus seminar on III-V Nanowires , Bad Honnef 2011-02-21 - 2011-02-23
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Populærvitenskapelig foredragWeman, Helge. (2011) Guest seminar at Seoul National University: Nanotechnology at NTNU. Seoul National University Nanostudent excursion to Korea 2011 , Seoul 2011-04-25 - 2011-04-25
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PosterOlk, Phillip; Härtling, Thomas; DONG CHUL, KIM; Weman, Helge. (2011) Contacting single nanowires by confocal photodeposition of metal. GDR Semiconductor Nanowires and Nanotubes GDR Nanofils 2011 , Porquerolles 2011-10-17 - 2011-10-21
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Vitenskapelig foredragAhtapodov, Lyubomir; Olk, Phillip; Todorovic, Jelena; Mjåland, Terje Sund; Eriksson, M.; Bergman, P. (2011) Combined studies of single Au-assisted GaAs/AlGaAs core/shell nanowires with PL spectroscopy and TEM. PDI Topical Workshop on MBE-grown Arsenide Nanowires , Berlin 2011-09-08 - 2011-09-09
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Vitenskapelig foredragDasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; DONG CHUL, KIM; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2011) Controlling crystal phases in GaAs nanowires grown by Au- and Ga-assisted MBE. PDI Topical Workshop on MBE-grown Arsenide Nanowires , Berlin 2011-09-08 - 2011-09-08
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Vitenskapelig foredragKauko, Hanne; Grieb, Tim; Rosenauer, A.; Bjørge, Ruben; Munshi, Abdul Mazid; Weman, Helge. (2011) Composition analysis of heterostructured GaAs nanowires with quantitative HAADF-STEM. NTNU Nanolab 6th Nanolab usermeeting , Trondheim 2011-11-16 - 2011-11-16
2010
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PosterWeigand, Christian Carl; Grepstad, Jostein; Bergren, Matt; Weman, Helge; Furtak, Tom; Collins, Reuben. (2010) ZnO nanostructures grown by pulsed laser deposition. Norwegian PhD Network on Nanotechnology for Microsystems 1st Annual Workshop of the Norwegian PhD Network on Nanotechnology for Microsystems , Tønsberg 2010-05-31 - 2010-06-02
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PosterDONG CHUL, KIM; Ahtapodov, Lyubomir; Bø, A. B; Choi, J. W.; Ji, H.; Kim, G. T.. (2010) Photocurrent Spectroscopy of Single Wurtzite GaAs Nanowires. ICPS 2010 , Seoul 2010-07-25 - 2010-07-30
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Vitenskapelig foredragAhtapodov, Lyubomir; Anthonysamy, Fervin Moses; Olk, Phillip; Kim, D.C.; Weman, Helge. (2010) The Nanophotonics Lab at NTNU: A Cool Place for Small Things with a Bright Future. NTNU NanoLab 5th NanoLab user meeting , Trondheim 2010-09-10 - 2010-09-10
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Vitenskapelig foredragAnthonysamy, Fervin Moses; Hoang, Thang Ba; Ahtapodov, Lyubomir; Dasa, Lakshmi Narayana; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2010) Engineering photoluminescence polarization in a single semiconductor nanowire. NTNU NanoLab 5th NanoLab user meeting , Trondheim 2010-09-10 - 2010-09-10
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Vitenskapelig foredragDasa, Lakshmi Narayana; Munshi, Abdul Mazid; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2010) Tuning of the crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy. NTNU NanoLab 5th NanoLab user meeting , Trondheim 2010-09-10 -
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Vitenskapelig foredragDasa, Lakshmi Narayana; Munshi, Abdul Mazid; Fimland, Bjørn-Ove; Weman, Helge; Van Helvoort, Antonius. (2010) Controlling crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy. 5th nanowire growth workshop , Rome 2010-11-03 - 2010-11-05
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Vitenskapelig foredragFurtak, T.E.; Baker, D.J.; Weigand, Christian Carl; Adamson, Jamie M.; Allen, C.G.; Yocom, A.E.. (2010) Surface Modification of Zinc Oxide Anodes in Organic Solar Cells. Materials Research Society MRS Spring meeeting , San Francisco 2010-04-05 - 2010-04-09
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Vitenskapelig foredragWeigand, Christian Carl; Ladam, C.; Bergren, Matt; Tveit, Johannes; Vullum, Per Erik; Dahl, Øystein. (2010) ZnO nanostructures grown by pulsed laser deposition. NTNU NanoLab 5th NTNU Nanolab Users Mtg. , Trondheim 2010-09-10 -
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Vitenskapelig foredragDasa, Lakshmi Narayana; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2010) Growth of heterostructured III-V semiconductor nanowires by molecular beam epitaxy. Nano-network workshop 2010 , Tønsberg 2010-05-31 - 2010-06-02
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Vitenskapelig foredragDasa, Lakshmi Narayana; Munshi, Abdul Mazid; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2010) Controlling crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy. 16th International Conference on Molecular Beam Epitaxy , Berlin 2010-08-22 - 2010-08-27
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Vitenskapelig foredragWeigand, Christian Carl; Baker, D.J.; Adamson, Jamie M.; Allen, C.G.; Bergren, M.R.; Steirer, K.X.. (2010) ZnO nanorod hybrid Organic/Inorganic Solar Cells and the effect of surface modifications. NTNU Renewable Energy Research Conference , Trondheim 2010-06-07 - 2010-06-10
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Vitenskapelig foredragWeman, Helge. (2010) Heterostructured III-V nanowires for photonic applications. Prof. Gyu Tae Kim, Korea University Invited seminar Korea University, Seoul-Korea , Seoul 2010-07-22 - 2010-07-22
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Vitenskapelig foredragWeman, Helge. (2010) Heterostructured III-V nanowires for photonic applications. Dr. Seo Sunae, Samsung Electronics Invited seminar Samsung Electronics,Korea , Suwon 2010-07-23 - 2010-07-23
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Vitenskapelig foredragWeman, Helge. (2010) Heterostructured III-V nanowires for photonic applications. Prof. Yung Woo Park, Seoul National University Invited seminar Seoul National University, Korea , Seoul 2010-07-21 - 2010-07-21
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Vitenskapelig foredragDasa, Lakshmi Narayana; Zhou, Hailong; Anthonysamy, Fervin Moses; Hoang, Thang Ba; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2010) Tuning of the crystal phase in III-V nanowires grown by Au-assisted molecular beam epitaxy. MRS MRS Spring meeting , San Fransisco 2010-04-05 - 2010-04-05
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Vitenskapelig foredragAnthonysamy, Fervin Moses; Ahtapodov, Lyubomir; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2010) Micro-photoluminescence spectroscopy and imaging of single axial and radial heterostructured III-V nanowires. Norwegian electro-Optics meeting , Ålesund 2010-04-07 - 2010-04-09
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Vitenskapelig foredragWeman, Helge. (2010) Heterostructured III-V nanowires with mixed crystal phases. UCLA Invited seminar University of California Los Angeles , Los Angeles 2010-01-29 - 2010-01-29
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Vitenskapelig foredragWeman, Helge. (2010) Heterostructured III-V nanowires with mixed crystal phases: New possibilities for bandstructure engineering. UCSD Invited seminar University of California San Diego , San Diego 2010-02-01 - 2010-02-01
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Vitenskapelig foredragSvendsen, Guro Kristin; Weman, Helge; Skaar, Johannes. (2010) Modelling of reflection properties of nanowire lasers. Norwegian Electro-Optics Meeting 2010 , Ålesund 2010-04-07 - 2010-04-09
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Vitenskapelig foredragWeman, Helge. (2010) Structural and optical properties of single III-V nanowires with different crystal phases. University of Oslo and IMEC, Belgium Invited seminar at NorPRINS workshop, Oslo , Oslo 2010-03-04 - 2010-03-05
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Vitenskapelig foredragDasa, Lakshmi Narayana; Zhou, Hailong; Anthonysamy, Fervin Moses; Hoang, Thang Ba; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2010) Growth of heterostructured III-V nanowires by molecular beam epitaxy for photonic applications. SPIE Photonics West , San Francisco 2010-01-23 - 2010-01-28
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PosterAhtapodov, Lyubomir; Anthonysamy, Fervin Moses; Kim, D.C.; Olk, Phillip; Hoang, Thang Ba; Weman, Helge. (2010) The Nanophotonics Lab at NTNU: A Cool place for Small things with a Bright future. NTNU Norwegian Electro-Optics meeting , Ålesund 2010-04-07 - 2010-04-09
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PosterKim, D.C.; Ahtapodov, Lyubomir; Boe, A.B.; Choi, J.W.; Ji, H.; Kim, G.T.. (2010) Photocurrent Spectroscopy of Single Wurtzite GaAs Nanowires. Korea Physical Society 30th International Conf. on the Physics of Semiconductors , Seoul 2010-07-25 - 2010-07-30
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PosterDasa, Lakshmi Narayana Dheeraj; Munshi, Abdul Mazid; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge. (2010) Control of wurtzite and zinc blende crystal phases in single GaAs nanowires grown by Au-assisted molecular beam epitaxy. 5th Nanowire growth workshop , Rome 2010-11-04 - 2010-11-04
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PosterWeigand, Christian Carl; Grepstad, Jostein; Weman, Helge; Ladam, C.; Vullum, Per Erik; Dahl, Øystein. (2010) ZnO nanosheets grown by pulsed laser deposition. 5th Nanowire Growth Workshop , Rome 2010-11-03 - 2010-11-05
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PosterLadam, C.; Weman, Helge; Vetaas Thomassen, M.; Weigand, Christian Carl; Røyset, Arne. (2010) Photoluminescence characterization of ZnO nanorods. NTNU Norwegian Electro-Optics meeting , Ålesund 2010-04-07 - 2010-04-09
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PosterAnthonysamy, Fervin Moses; Hoang, Thang Ba; Ahtapodov, Lyubomir; Dasa, Lakshmi Narayana; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2010) Photoluminescence polarization anisotropy in a single heterostructured III-V nanowire with mixed crystal phases. 30th International Conference on the Physics of Semiconductors (ICPS 2010) , Seoul 2010-07-25 - 2010-07-30
2009
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IntervjuWeman, Helge. (2009) Satser mye på lite. Under Dusken, nr 8, 2009 Under Dusken, nr 8, 2009 [Avis] 2009-05-05
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Intervju
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Vitenskapelig foredragRøyset, Arne; Fagerberg, Ragnar; Weman, Helge. (2009) Cool, Small and Bright: cryogenic micro-photoluminescence for photovoltaic materials. FFI Renewable Energy R&D-seminar, OPV2009: PV-materials , Oppdal 2009-03-19 - 2009-03-21
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Vitenskapelig foredragWeman, Helge. (2009) Semiconductor nanowires for solar cell applications. NTNU 4th KIFEE Symposium on Environment, Energy, Materials and Education , Trondheim 2009-09-06 - 2009-09-09
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Vitenskapelig foredragHoang, Thang Ba; Anthonysamy, Fervin Moses; Zhou, Hailong; Dasa, Lakshmi Narayana; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2009) Crystal phase dependent photoluminescence polarization in single semiconductor nanowires. Georgia Tech., Atlanta 3rd International conf. on One-dimensional Nanomaterials , Atlanta 2009-12-07 - 2009-12-09
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Vitenskapelig foredragWeigand, Christian Carl; Bergren, Matt; Ladam, Cecile; Vullum, Per Erik; Walmsley, John C; Fagerberg, Ragnar. (2009) Characterization of ZnO Nanostructures Grown by Pulsed Laser Deposition. Materials Research Society MRS Spring Meeting 2009 , San Francisco 2009-04-13 - 2009-04-17
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Vitenskapelig foredragHoang, Thang Ba; Anthonysamy, Fervin Moses; Zhou, Hailong; Dasa, Lakshmi Narayana; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2009) Polarized micro-photoluminescence imaging of single GaAs/AlGaAs core-shell nanowires with GaAsSb inserts. Materials Research Society Materials Res. Soc. 2009 Fall Meeting, Symposium O: Excitons and Plasmon Resonances in Nanostructures II , Boston 2009-11-29 - 2009-12-04
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Vitenskapelig foredragLadam, Cecile; Weigand, Christian Carl; Skåre, Daniel; Vardøy, Astrid-Sofie Borge; Dahl, Øystein; Bergren, Matt. (2009) Nanostructured ZnO layers grown by pulsed laser deposition for hybrid inorganic/organic solar cells. NFR NANOMAT conference 2009 , Lillehammer 2009-06-15 - 2009-06-17
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Vitenskapelig foredragVan Helvoort, Antonius; Dasa, Lakshmi Narayana; Grønsberg, Sondre; Patriarche, G.; Zhou, Hailong; Hoang, Thang Ba. (2009) Semiconductor nanowire heterostructures characterization by dark field TEM. NTNU Nanolab 4th NTNU Nanolab User Meeting , Trondheim 2009-05-13 -
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Vitenskapelig foredragAnthonysamy, Fervin Moses; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Zhou, Hailong; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2009) Optical properties of axial and radial heterostructured III-V semiconductor nanowires. NTNU Nanolab 4th NTNU Nanolab User Meeting , Trondheim 2009-05-13 -
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Vitenskapelig foredragAnthonysamy, Fervin Moses; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Zhou, Hailong; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2009) Micro-photoluminescence study of single GaAsSb/GaAs radial and axial heterostructured core-shell nanowires. MRS E-MRS 2009 , Strasbourg 2009-06-08 - 2009-06-12
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Vitenskapelig foredragHoang, Thang Ba; Anthonysamy, Fervin Moses; Zhou, Hailong; Dasa, Lakshmi Narayana; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2009) Wurtzite GaAs and zinc blende GaAsSb nanowires: New possibilities for heterostructure engineering. NFR NANOMAT conference 2009 , Lillehamer 2009-06-16 - 2009-06-17
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Vitenskapelig foredragWeman, Helge. (2009) Heterostructured III-V nanowires for photonic applications. Forsvarets Forskningsinstitutt Invited talk at FFI Material worskhop , Kongsvinger 2009-09-08 - 2009-09-09
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Vitenskapelig foredragWeman, Helge. (2009) Heterostructured III-V nanowires for photonic applications. Kavli Institute of Nanoscience, Delft Technical University Invited seminar at Kavli Institute of Nanoscience, Delft TU , Deflt 2009-06-19 - 2009-06-19
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Vitenskapelig foredragWeman, Helge. (2009) Heterostructured III-V nanowires with mixed crystal phases: New possibilities for band-structure engineering. IBM Zurich Research Lab. Invited seminar at IBM Zurich Research Lab. , Rueschlikon 2009-05-26 - 2009-05-26
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Vitenskapelig foredragDasa, Lakshmi Narayana; Van Helvoort, Antonius; Zhou, Hailong; Anthonysamy, Fervin Moses; Hoang, Thang Ba; Rogstad, Espen. (2009) Tailoring of semiconductor heterostructure nanowires for photonic applications by molecular beam epitaxy. NTNU Nanolab 4th NTNU Nanolab User Meeting , Trondheim 2009-05-13 -
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Vitenskapelig foredragDasa, Lakshmi Narayana; Hoang, Thang Ba; Anthonysamy, Fervin Moses; Zhou, Hailong; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2009) Heterostructured III-V Nanowires with Mixed Crystal Phases: New Possibilities for Heterostructure Engineering. Nordic Semiconductor Meeting , Reykjavik 2009-06-14 - 2009-06-17
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Vitenskapelig foredragWeman, Helge. (2009) Heterostructured wurtzite/zinc-blende GaAs/GaAsSb core-shell nanowires: New possibilities for band-structure engineering in nanowires. Hokkaido University Invited talk at 2009 RCIQE International Seminar on Advanced Semiconductor Materials and Devices, Sapporo, Japan , Sapporo 2009-03-02 - 2009-03-03
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Vitenskapelig foredragZhou, Hailong; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Anthonysamy, Fervin Moses; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2009) Self-organized wurtzite AlGaAs core-shell nanowires with GaAs inserts grown by molecular beam epitaxy. CNRS (GDR 2974), CEA (INAC) GdR Nanofils et Nanotubes Semiconducteurs - Workshop 2009 , Autrans 2009-06-30 - 2009-07-03
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Vitenskapelig foredragVan Helvoort, Antonius; Dasa, Lakshmi Narayana; Grønsberg, Sondre; Patriarche, G.; Zhou, Hailong; Fimland, Bjørn-Ove. (2009) Dark field transmission electron microscopy techniques for structural characterization of semiconductor nanowire heterostructures. IoP EMAG 2009 , Sheffield 2009-09-08 - 2009-09-11
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Vitenskapelig foredragWeman, Helge. (2009) Heterostructured III-V nanowires with mixed crystal phases: New possibilities for band structure engineering. Univ. of Cincinnati Invited Physics Seminar at Univ. of Cincinnati , Cincinnati 2009-12-10 - 2009-12-10
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Vitenskapelig foredragWeman, Helge. (2009) Challenges and possibilities of heterostructured semiconductor nanowires for photonic device applications. NTNU NanoLab NTNU NanoLab Seminarseries , Trondheim 2009-10-13 - 2009-10-13
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Vitenskapelig foredragWeman, Helge. (2009) Heterostructured III-V nanowires with mixed crystal phases: New possibilities for band structure engineering. Georgia Tech., Atlanta Post deadline talk at Third International Conference on One-dimensional Nanomaterials, Atlanta, USA , Atlanta 2009-12-07 - 2009-12-09
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Vitenskapelig foredragWeman, Helge. (2009) Micro-photoluminescence study of hetero-structured GaAs/AlGaAs and GaAs/GaAsSb nanowires grown by molecular beam epitaxy. Invited talk at Int. Conf. on Transport and Optical Properties of Nanomaterials, Allahabad, India , Allahabad 2009-01-05 - 2009-01-08
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PosterDasa, Lakshmi Narayana; Rogstad, Espen; Scheffler, Martha; Van Helvoort, Antonius; Zhou, Hailong; Patriarche, G.. (2009) Diffusion-limited growth of GaAs nanowires by Au-assisted molecular beam epitaxy. 4th GDR meeting , Autrans 2009-06-30 - 2009-07-03
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PosterZhou, Hailong; Dasa, Lakshmi Narayana; Hoang, Thang Ba; Anthonysamy, Fervin Moses; Van Helvoort, Antonius; Fimland, Bjørn-Ove. (2009) Characterization of heterostructured III-V nanowires grown by molecular beam epitaxy. NTNU Nanolab 4th NTNU Nanolab User Meeting , Trondheim 2009-05-13 -
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Poster