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Effects of Supersaturation on the Crystal Structure of Gold Seeded III-V Nanowires

Johansson, Jonas LU ; Karlsson, Lisa LU ; Dick Thelander, Kimberly LU ; Bolinsson, Jessica; Wacaser, Brent LU ; Deppert, Knut LU and Samuelson, Lars LU (2009) In Crystal Growth & Design 9(2). p.766-773
Abstract
We present results that provide fundamental insights on how to experimentally tailor the planar defect density and even the crystal structure in III-V metal particle seeded nanowires, where zinc blende is the stable bulk crystal structure. We have grown GaP nanowires with metal-organic vapor phase epitaxy under different conditions: pulsing of the Ga source, and continuous growth with and without In background. The dominant crystal structure of the nanowires is zinc blende, which when grown under continuous conditions has a high density of twin planes perpendicular to the growth direction. Using pulsed growth, we observed that the twin plane separations were much longer than those observed for continuous growth with an In background. On... (More)
We present results that provide fundamental insights on how to experimentally tailor the planar defect density and even the crystal structure in III-V metal particle seeded nanowires, where zinc blende is the stable bulk crystal structure. We have grown GaP nanowires with metal-organic vapor phase epitaxy under different conditions: pulsing of the Ga source, and continuous growth with and without In background. The dominant crystal structure of the nanowires is zinc blende, which when grown under continuous conditions has a high density of twin planes perpendicular to the growth direction. Using pulsed growth, we observed that the twin plane separations were much longer than those observed for continuous growth with an In background. On the other hand, during continuous growth, under In-free conditions, a considerable amount of the wurtzite phase forms. We explain the importance of the In background during growth. With classical nucleation modeling we qualitatively relate the density of planar defects in a nanowire to the growth conditions. For low supersaturations, we predict a low twin plane density, consistent with our experimental observations of pulsed nanowire growth. In addition, we suggest that under certain conditions, it might be possible to grow wires with almost perfect wurtzite structure. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Crystal Growth & Design
volume
9
issue
2
pages
766 - 773
publisher
The American Chemical Society
external identifiers
  • wos:000263048200021
  • scopus:61749091911
ISSN
1528-7483
DOI
10.1021/cg800270q
language
English
LU publication?
yes
id
b6add32a-fd74-4b2d-bfa6-bbb854575304 (old id 1311556)
date added to LUP
2009-03-17 09:28:13
date last changed
2017-10-01 03:58:40
@article{b6add32a-fd74-4b2d-bfa6-bbb854575304,
  abstract     = {We present results that provide fundamental insights on how to experimentally tailor the planar defect density and even the crystal structure in III-V metal particle seeded nanowires, where zinc blende is the stable bulk crystal structure. We have grown GaP nanowires with metal-organic vapor phase epitaxy under different conditions: pulsing of the Ga source, and continuous growth with and without In background. The dominant crystal structure of the nanowires is zinc blende, which when grown under continuous conditions has a high density of twin planes perpendicular to the growth direction. Using pulsed growth, we observed that the twin plane separations were much longer than those observed for continuous growth with an In background. On the other hand, during continuous growth, under In-free conditions, a considerable amount of the wurtzite phase forms. We explain the importance of the In background during growth. With classical nucleation modeling we qualitatively relate the density of planar defects in a nanowire to the growth conditions. For low supersaturations, we predict a low twin plane density, consistent with our experimental observations of pulsed nanowire growth. In addition, we suggest that under certain conditions, it might be possible to grow wires with almost perfect wurtzite structure.},
  author       = {Johansson, Jonas and Karlsson, Lisa and Dick Thelander, Kimberly and Bolinsson, Jessica and Wacaser, Brent and Deppert, Knut and Samuelson, Lars},
  issn         = {1528-7483},
  language     = {eng},
  number       = {2},
  pages        = {766--773},
  publisher    = {The American Chemical Society},
  series       = {Crystal Growth & Design},
  title        = {Effects of Supersaturation on the Crystal Structure of Gold Seeded III-V Nanowires},
  url          = {http://dx.doi.org/10.1021/cg800270q},
  volume       = {9},
  year         = {2009},
}