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Phase Segregation in AlInP Shells on GaAs Nanowires

Sköld, Niklas LU ; Wagner, Jakob LU ; Karlsson, Gunnel LU ; Hernan, Tania; Seifert, Werner LU ; Pistol, Mats-Erik LU and Samuelson, Lars LU (2006) In Nano Letters 6(12). p.2743-2747
Abstract
We have studied morphology and phase segregation of AlInP shells on GaAs nanowires. Photoluminescence measurements on single core-

shell nanowires indicated variations in the shell composition, and phase segregation was confirmed by cross-sectional scanning transmission

electron microscopy on 30 nm thin slices of the wires. It was discovered that Al-rich domains form in the á112ñ directions where two {110}

shell facets meet during growth. We propose that the mechanism behind this phase segregation is a variation in the chemical potential along

the circumference of the nanowire together with a difference in diffusion lengths for the different growth species. From the morphology of the

core and... (More)
We have studied morphology and phase segregation of AlInP shells on GaAs nanowires. Photoluminescence measurements on single core-

shell nanowires indicated variations in the shell composition, and phase segregation was confirmed by cross-sectional scanning transmission

electron microscopy on 30 nm thin slices of the wires. It was discovered that Al-rich domains form in the á112ñ directions where two {110}

shell facets meet during growth. We propose that the mechanism behind this phase segregation is a variation in the chemical potential along

the circumference of the nanowire together with a difference in diffusion lengths for the different growth species. From the morphology of the

core and the shell, we conclude that the side facet growth is temperature dependent forming {112} facets at low growth temperature and

{110} facets at high growth temperature (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
6
issue
12
pages
2743 - 2747
publisher
The American Chemical Society
external identifiers
  • wos:000242786500019
  • scopus:33846341806
ISSN
1530-6992
DOI
10.1021/nl061692d
language
English
LU publication?
yes
id
629a6a8b-8463-40b9-a562-3f3b92358d11 (old id 644075)
alternative location
http://pubs.acs.org/cgi-bin/article.cgi/nalefd/2006/6/i12/pdf/nl061692d.pdf
date added to LUP
2007-12-03 16:49:19
date last changed
2019-03-17 04:22:51
@article{629a6a8b-8463-40b9-a562-3f3b92358d11,
  abstract     = {We have studied morphology and phase segregation of AlInP shells on GaAs nanowires. Photoluminescence measurements on single core-<br/><br>
shell nanowires indicated variations in the shell composition, and phase segregation was confirmed by cross-sectional scanning transmission<br/><br>
electron microscopy on 30 nm thin slices of the wires. It was discovered that Al-rich domains form in the á112ñ directions where two {110}<br/><br>
shell facets meet during growth. We propose that the mechanism behind this phase segregation is a variation in the chemical potential along<br/><br>
the circumference of the nanowire together with a difference in diffusion lengths for the different growth species. From the morphology of the<br/><br>
core and the shell, we conclude that the side facet growth is temperature dependent forming {112} facets at low growth temperature and<br/><br>
{110} facets at high growth temperature},
  author       = {Sköld, Niklas and Wagner, Jakob and Karlsson, Gunnel and Hernan, Tania and Seifert, Werner and Pistol, Mats-Erik and Samuelson, Lars},
  issn         = {1530-6992},
  language     = {eng},
  number       = {12},
  pages        = {2743--2747},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Phase Segregation in AlInP Shells on GaAs Nanowires},
  url          = {http://dx.doi.org/10.1021/nl061692d},
  volume       = {6},
  year         = {2006},
}