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Length Distributions of Nanowires Growing by Surface Diffusion

Dubrovskii, Vladimir G.; Berdnikov, Yury; Schmidtbauer, Jan; Borg, Mattias LU ; Storm, Kristian LU ; Deppert, Knut LU and Johansson, Jonas LU (2016) In Crystal Growth & Design 16(4). p.2167-2172
Abstract

We present experimental data on the time and radius-dependent length distributions of Au-catalyzed InAs nanowires grown by metal organic vapor phase epitaxy. We show that these distributions are not as sharp as commonly believed. Rather, they appear to be much broader than Poissonian from the very beginning and spread quickly as the nanowires grow. We develop a model that attributes the observed broadening to the diffusion-induced character of growth. In the initial growth stage, the nanowires are fed from their entire length, leading to a Polya-like length distribution whose standard deviation is proportional to the mean length. After the nanowire length exceeds the adatom diffusion length, the growth acquires a Poissonian character in... (More)

We present experimental data on the time and radius-dependent length distributions of Au-catalyzed InAs nanowires grown by metal organic vapor phase epitaxy. We show that these distributions are not as sharp as commonly believed. Rather, they appear to be much broader than Poissonian from the very beginning and spread quickly as the nanowires grow. We develop a model that attributes the observed broadening to the diffusion-induced character of growth. In the initial growth stage, the nanowires are fed from their entire length, leading to a Polya-like length distribution whose standard deviation is proportional to the mean length. After the nanowire length exceeds the adatom diffusion length, the growth acquires a Poissonian character in which the standard deviation scales as a square root of the mean length. We explain why wider nanowires have smaller length dispersion and speculate on the length distributions in Au-catalyzed versus self-catalyzed growth methods.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Crystal Growth & Design
volume
16
issue
4
pages
6 pages
publisher
The American Chemical Society
external identifiers
  • Scopus:84964639933
ISSN
1528-7483
DOI
10.1021/acs.cgd.5b01832
language
English
LU publication?
yes
id
2c25933e-6104-4f45-961b-00220b0e8c1e
date added to LUP
2016-08-26 08:44:19
date last changed
2016-10-13 05:12:48
@misc{2c25933e-6104-4f45-961b-00220b0e8c1e,
  abstract     = {<p>We present experimental data on the time and radius-dependent length distributions of Au-catalyzed InAs nanowires grown by metal organic vapor phase epitaxy. We show that these distributions are not as sharp as commonly believed. Rather, they appear to be much broader than Poissonian from the very beginning and spread quickly as the nanowires grow. We develop a model that attributes the observed broadening to the diffusion-induced character of growth. In the initial growth stage, the nanowires are fed from their entire length, leading to a Polya-like length distribution whose standard deviation is proportional to the mean length. After the nanowire length exceeds the adatom diffusion length, the growth acquires a Poissonian character in which the standard deviation scales as a square root of the mean length. We explain why wider nanowires have smaller length dispersion and speculate on the length distributions in Au-catalyzed versus self-catalyzed growth methods.</p>},
  author       = {Dubrovskii, Vladimir G. and Berdnikov, Yury and Schmidtbauer, Jan and Borg, Mattias and Storm, Kristian and Deppert, Knut and Johansson, Jonas},
  issn         = {1528-7483},
  language     = {eng},
  month        = {04},
  number       = {4},
  pages        = {2167--2172},
  publisher    = {ARRAY(0xacc7ea8)},
  series       = {Crystal Growth & Design},
  title        = {Length Distributions of Nanowires Growing by Surface Diffusion},
  url          = {http://dx.doi.org/10.1021/acs.cgd.5b01832},
  volume       = {16},
  year         = {2016},
}