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Thermodynamic stability of gold-assisted InAs nanowire growth

Tornberg, Marcus LU ; Dick, Kimberly A. LU and Lehmann, Sebastian LU (2017) In Journal of Physical Chemistry C 121(39). p.21678-21684
Abstract

Growth of III-V semiconductor nanowires is generally assisted by a liquid particle in order to get a highly anisotropic crystallization. The thermodynamic stability of the particle is therefore of importance for control and understanding of the nanowire growth process. In this report we explore the particle stability by manipulating its properties, specifically its surface tension and volume, by accumulating indium in the particle during nanowire growth. We demonstrate a droplet displacement, from the top to one of the nanowire side facets, when exceeding the stability limit for a gold particle wetting an [0001]-oriented InAs nanowire. This particle displacement is attributed to a lowered surface tension and a truncation of the top... (More)

Growth of III-V semiconductor nanowires is generally assisted by a liquid particle in order to get a highly anisotropic crystallization. The thermodynamic stability of the particle is therefore of importance for control and understanding of the nanowire growth process. In this report we explore the particle stability by manipulating its properties, specifically its surface tension and volume, by accumulating indium in the particle during nanowire growth. We demonstrate a droplet displacement, from the top to one of the nanowire side facets, when exceeding the stability limit for a gold particle wetting an [0001]-oriented InAs nanowire. This particle displacement is attributed to a lowered surface tension and a truncation of the top facet. In addition, our results indicate reversibility of the displacement, showing that the (111/0001) facet is the most favorable for a droplet to wet during common growth conditions. The stability condition for InAs growth is determined experimentally, and the understanding developed can easily be applied to other III-V nanowires.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
121
issue
39
pages
7 pages
publisher
The American Chemical Society
external identifiers
  • scopus:85032807431
ISSN
1932-7447
DOI
10.1021/acs.jpcc.7b06138
language
English
LU publication?
yes
id
14f8ffcf-afc9-4256-bf2a-9b49784e5af0
date added to LUP
2017-11-15 09:19:50
date last changed
2018-01-07 12:25:47
@article{14f8ffcf-afc9-4256-bf2a-9b49784e5af0,
  abstract     = {<p>Growth of III-V semiconductor nanowires is generally assisted by a liquid particle in order to get a highly anisotropic crystallization. The thermodynamic stability of the particle is therefore of importance for control and understanding of the nanowire growth process. In this report we explore the particle stability by manipulating its properties, specifically its surface tension and volume, by accumulating indium in the particle during nanowire growth. We demonstrate a droplet displacement, from the top to one of the nanowire side facets, when exceeding the stability limit for a gold particle wetting an [0001]-oriented InAs nanowire. This particle displacement is attributed to a lowered surface tension and a truncation of the top facet. In addition, our results indicate reversibility of the displacement, showing that the (111/0001) facet is the most favorable for a droplet to wet during common growth conditions. The stability condition for InAs growth is determined experimentally, and the understanding developed can easily be applied to other III-V nanowires.</p>},
  author       = {Tornberg, Marcus and Dick, Kimberly A. and Lehmann, Sebastian},
  issn         = {1932-7447},
  language     = {eng},
  number       = {39},
  pages        = {21678--21684},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry C},
  title        = {Thermodynamic stability of gold-assisted InAs nanowire growth},
  url          = {http://dx.doi.org/10.1021/acs.jpcc.7b06138},
  volume       = {121},
  year         = {2017},
}