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The compositional homogeneity of the metal particle during vapor–liquid–solid growth of nanowires

Johansson, Jonas LU orcid ; Overgaard, Niels Chr LU and Magnusson, Martin H. LU (2020) In Scientific Reports 10(1).
Abstract

The vapor–liquid–solid (VLS) mechanism is probably the most versatile method to fabricate semiconductor nanowires and several investigations assume a compositionally homogeneous catalyst particle. In this investigation we address the compositional homogeneity of the catalyst particle during growth of nanowires. Using diffusion calculations, we show that the particle is indeed homogeneous during VLS growth, but can have a strong concentration gradient during vapor–solid–solid growth, that is, growth with a solid particle. We also show that the response to a concentration change is extremely fast, meaning that if the concentration at the surface of the particle changes, the entire particle reaches this new concentration effectively... (More)

The vapor–liquid–solid (VLS) mechanism is probably the most versatile method to fabricate semiconductor nanowires and several investigations assume a compositionally homogeneous catalyst particle. In this investigation we address the compositional homogeneity of the catalyst particle during growth of nanowires. Using diffusion calculations, we show that the particle is indeed homogeneous during VLS growth, but can have a strong concentration gradient during vapor–solid–solid growth, that is, growth with a solid particle. We also show that the response to a concentration change is extremely fast, meaning that if the concentration at the surface of the particle changes, the entire particle reaches this new concentration effectively instantaneously.

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Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Scientific Reports
volume
10
issue
1
article number
11041
publisher
Nature Publishing Group
external identifiers
  • scopus:85087524408
  • pmid:32632137
ISSN
2045-2322
DOI
10.1038/s41598-020-67618-x
language
English
LU publication?
yes
id
77683a6c-434f-4503-9514-71e5fbf3dac9
date added to LUP
2020-07-14 10:55:27
date last changed
2024-04-03 11:37:21
@article{77683a6c-434f-4503-9514-71e5fbf3dac9,
  abstract     = {{<p>The vapor–liquid–solid (VLS) mechanism is probably the most versatile method to fabricate semiconductor nanowires and several investigations assume a compositionally homogeneous catalyst particle. In this investigation we address the compositional homogeneity of the catalyst particle during growth of nanowires. Using diffusion calculations, we show that the particle is indeed homogeneous during VLS growth, but can have a strong concentration gradient during vapor–solid–solid growth, that is, growth with a solid particle. We also show that the response to a concentration change is extremely fast, meaning that if the concentration at the surface of the particle changes, the entire particle reaches this new concentration effectively instantaneously.</p>}},
  author       = {{Johansson, Jonas and Overgaard, Niels Chr and Magnusson, Martin H.}},
  issn         = {{2045-2322}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Scientific Reports}},
  title        = {{The compositional homogeneity of the metal particle during vapor–liquid–solid growth of nanowires}},
  url          = {{http://dx.doi.org/10.1038/s41598-020-67618-x}},
  doi          = {{10.1038/s41598-020-67618-x}},
  volume       = {{10}},
  year         = {{2020}},
}