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Palladium Catalyzed Defect-free <110> Zinc-Blende Structured InAs Nanowires

Published online by Cambridge University Press:  21 August 2013

Hongyi Xu ,
Qiang Gao ,
H. Hoe Tan ,
Chennupati Jagadish  and
Jin Zou
Hongyi Xu
Affiliation:
Materials Engineering, The University of Queensland, QLD 4072, Australia
Qiang Gao
Affiliation:
Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia
H. Hoe Tan
Affiliation:
Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia
Chennupati Jagadish
Affiliation:
Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia
Jin Zou
Affiliation:
Materials Engineering, The University of Queensland, QLD 4072, Australia Centre for Microscopy and Microanalysis, The University of Queensland, QLD 4072, Australia
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Abstract

In this study, Pd thin film is used as catalyst to grow epitaxial InAs nanowires on GaAs(111)B substrate in a metal-organic chemical vapor deposition reactor to explore the growth mechanism and the effects of non-gold catalysts in the growth of III-V epitaxial nanowires. Through detailed morphological, structural and chemical characterization using scanning and transmission electron microscopy, it is found that defect-free zinc-blende structured epitaxial InAs nanowires are grown along the <110> directions with four {111} sidewall facets forming a diamond shaped cross-section. Furthermore, the interface between the nanowire/catalyst is found to be the uncommon {113} planes. It is anticipated that these zinc-blende structured InAs nanowires are grown via the vapor-liquid-solid mechanism. The defect-free nature of these nanowires arises from the non-<111> growth direction and non-{111} nanowire/catalyst interface.

Keywords

III-Vnanostructuretransmission electron microscopy (TEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1551: Symposium R – Nanostructured Semiconductors and Nanotechnology , 2013 , pp. 95 - 99
Copyright
Copyright © Materials Research Society 2013 

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References

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