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Visualizing the Mechanism Switching in High-Temperature Au-Catalyzed InAs Nanowire Growth

Escobar Steinvall, Simon LU ; Johansson, Jonas LU ; Lehmann, Sebastian LU ; Tornberg, Marcus LU ; Jacobsson, Daniel LU and Dick, Kimberly A. LU (2023) In Crystal Growth and Design 23(9). p.6228-6232
Abstract

We use environmental transmission electron microscopy to observe in situ the switch from an axial vapor-liquid-solid (VLS) growth mechanism in Au-catalyzed InAs nanowires toward a radial vapor-solid (VS) one, dominated by layers nucleating at the triple-phase line. At elevated temperatures, in addition to high V/III ratios, the affinity for In in the Au catalyst will be greater than that of In in InAs, which in turn reduces the driving force and probability for nucleation at the liquid-solid interface. Consequently, with increased temperature, the catalyst particle stops acting as a sink for incoming material and the decomposition of precursors away from the catalyst increases, making radial vapor-solid growth the dominating growth... (More)

We use environmental transmission electron microscopy to observe in situ the switch from an axial vapor-liquid-solid (VLS) growth mechanism in Au-catalyzed InAs nanowires toward a radial vapor-solid (VS) one, dominated by layers nucleating at the triple-phase line. At elevated temperatures, in addition to high V/III ratios, the affinity for In in the Au catalyst will be greater than that of In in InAs, which in turn reduces the driving force and probability for nucleation at the liquid-solid interface. Consequently, with increased temperature, the catalyst particle stops acting as a sink for incoming material and the decomposition of precursors away from the catalyst increases, making radial vapor-solid growth the dominating growth mechanism. It is further observed that the growth proceeds through multistep propagation rather than a layer-by-layer propagation under these conditions.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Crystal Growth and Design
volume
23
issue
9
pages
5 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85168612849
ISSN
1528-7483
DOI
10.1021/acs.cgd.3c00138
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2023 The Authors. Published by American Chemical Society.
id
7f39e9a0-9bbb-4183-90fd-735ad3f1fe2e
date added to LUP
2023-11-14 14:07:53
date last changed
2023-12-18 15:30:57
@article{7f39e9a0-9bbb-4183-90fd-735ad3f1fe2e,
  abstract     = {{<p>We use environmental transmission electron microscopy to observe in situ the switch from an axial vapor-liquid-solid (VLS) growth mechanism in Au-catalyzed InAs nanowires toward a radial vapor-solid (VS) one, dominated by layers nucleating at the triple-phase line. At elevated temperatures, in addition to high V/III ratios, the affinity for In in the Au catalyst will be greater than that of In in InAs, which in turn reduces the driving force and probability for nucleation at the liquid-solid interface. Consequently, with increased temperature, the catalyst particle stops acting as a sink for incoming material and the decomposition of precursors away from the catalyst increases, making radial vapor-solid growth the dominating growth mechanism. It is further observed that the growth proceeds through multistep propagation rather than a layer-by-layer propagation under these conditions.</p>}},
  author       = {{Escobar Steinvall, Simon and Johansson, Jonas and Lehmann, Sebastian and Tornberg, Marcus and Jacobsson, Daniel and Dick, Kimberly A.}},
  issn         = {{1528-7483}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{9}},
  pages        = {{6228--6232}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Crystal Growth and Design}},
  title        = {{Visualizing the Mechanism Switching in High-Temperature Au-Catalyzed InAs Nanowire Growth}},
  url          = {{http://dx.doi.org/10.1021/acs.cgd.3c00138}},
  doi          = {{10.1021/acs.cgd.3c00138}},
  volume       = {{23}},
  year         = {{2023}},
}