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A cathodoluminescence study of the influence of the seed particle preparation method on the optical properties of GaAs nanowires.

Gustafsson, Anders LU ; Hillerich, Karla LU ; Messing, Maria LU ; Storm, Kristian LU ; Dick Thelander, Kimberly LU ; Deppert, Knut LU and Bolinsson, Jessica LU (2012) In Nanotechnology 23(26).
Abstract
Cathodoluminescence at 8 K is used to compare the optical properties of AlGaAs-capped GaAs nanowires, grown by metal-organic vapour phase epitaxy and seeded by gold particles prepared by different methods. Six different methods were used to fabricate and deposit gold seed particles onto GaAs substrates: colloid particles, aerosol particles and particles defined by electron beam lithography. The nanowires were grown with and without an in situ annealing step prior to the nanowire growth. The morphology showed no significant differences between the nanowires. The emissions from ensembles of nanowires have the same peak position, irrespective of seed particle type. Without the in situ annealing step prior to the nanowire growth, there are... (More)
Cathodoluminescence at 8 K is used to compare the optical properties of AlGaAs-capped GaAs nanowires, grown by metal-organic vapour phase epitaxy and seeded by gold particles prepared by different methods. Six different methods were used to fabricate and deposit gold seed particles onto GaAs substrates: colloid particles, aerosol particles and particles defined by electron beam lithography. The nanowires were grown with and without an in situ annealing step prior to the nanowire growth. The morphology showed no significant differences between the nanowires. The emissions from ensembles of nanowires have the same peak position, irrespective of seed particle type. Without the in situ annealing step prior to the nanowire growth, there are significant differences in the emission intensity and emission patterns from nanowires grown from different seed particles. When an in situ annealing step is included, all the resulting nanowires show identical optical emission intensity and emission patterns. This shows the importance of using an in situ annealing step prior to growth. This study demonstrates that different preparation methods for gold seed particles can be used to produce GaAs nanowires with highly similar optical properties. The choice of particle preparation method to be used can therefore be based on availability and cost. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanotechnology
volume
23
issue
26
publisher
IOP Publishing
external identifiers
  • wos:000305411400016
  • pmid:22699683
  • scopus:84862683421
ISSN
0957-4484
DOI
10.1088/0957-4484/23/26/265704
language
English
LU publication?
yes
id
61d108a4-2d37-4270-8dca-1d2f805ca2d4 (old id 2859381)
date added to LUP
2012-07-06 14:41:48
date last changed
2017-01-01 03:52:15
@article{61d108a4-2d37-4270-8dca-1d2f805ca2d4,
  abstract     = {Cathodoluminescence at 8 K is used to compare the optical properties of AlGaAs-capped GaAs nanowires, grown by metal-organic vapour phase epitaxy and seeded by gold particles prepared by different methods. Six different methods were used to fabricate and deposit gold seed particles onto GaAs substrates: colloid particles, aerosol particles and particles defined by electron beam lithography. The nanowires were grown with and without an in situ annealing step prior to the nanowire growth. The morphology showed no significant differences between the nanowires. The emissions from ensembles of nanowires have the same peak position, irrespective of seed particle type. Without the in situ annealing step prior to the nanowire growth, there are significant differences in the emission intensity and emission patterns from nanowires grown from different seed particles. When an in situ annealing step is included, all the resulting nanowires show identical optical emission intensity and emission patterns. This shows the importance of using an in situ annealing step prior to growth. This study demonstrates that different preparation methods for gold seed particles can be used to produce GaAs nanowires with highly similar optical properties. The choice of particle preparation method to be used can therefore be based on availability and cost.},
  articleno    = {265704},
  author       = {Gustafsson, Anders and Hillerich, Karla and Messing, Maria and Storm, Kristian and Dick Thelander, Kimberly and Deppert, Knut and Bolinsson, Jessica},
  issn         = {0957-4484},
  language     = {eng},
  number       = {26},
  publisher    = {IOP Publishing},
  series       = {Nanotechnology},
  title        = {A cathodoluminescence study of the influence of the seed particle preparation method on the optical properties of GaAs nanowires.},
  url          = {http://dx.doi.org/10.1088/0957-4484/23/26/265704},
  volume       = {23},
  year         = {2012},
}