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Aerosol phase generation of In-Se nanoparticles

Geretovszky, Zsolt; Deppert, Knut LU ; Karlsson, Lisa LU ; Karlsson, Martin; Malm, Jan-Olle LU and Muhlberg, Manfred (2006) In Journal of Nanoscience and Nanotechnology 6(3). p.600-611
Abstract
Results on the generation and heat treatment of In-Se nanoparticles, made by heterogeneous condensation of selenium on indium nanoparticles synthesised via the evaporation/condensation route are reported. In-situ aerosol measurements are complemented with ex-situ analysis, to provide structural, morphological, and compositional information on the In-Se nanoparticles. Our results indicate that prior to heat treatment In-Se nanoparticles have a shape in the aerosol phase, similar to an asymmetric dumbbell. The bigger particle of the dumbbell structure is made up of amorphous Se, while the overall composition of the polycrystalline smaller particle is around InSe. The smaller particle has an intrinsic structure, and consists of different... (More)
Results on the generation and heat treatment of In-Se nanoparticles, made by heterogeneous condensation of selenium on indium nanoparticles synthesised via the evaporation/condensation route are reported. In-situ aerosol measurements are complemented with ex-situ analysis, to provide structural, morphological, and compositional information on the In-Se nanoparticles. Our results indicate that prior to heat treatment In-Se nanoparticles have a shape in the aerosol phase, similar to an asymmetric dumbbell. The bigger particle of the dumbbell structure is made up of amorphous Se, while the overall composition of the polycrystalline smaller particle is around InSe. The smaller particle has an intrinsic structure, and consists of different InSe-compounds, with a decreasing In content towards the shell. The shape of the In-Se nanoparticles is different in the aerosol phase and on the surface of the samples. The observed variety of particle sizes and shapes on the sample surface is shown to be partly due to the agglomeration of the aerosol phase binaries (i.e., dumbbells) via coalescence on the surface of the sample and wetting of the sample surface by the Se nanoparticles. These processes make the bigger particle of the dumbbell structure appear almost perfectly hemispherical on the sample surfaces. During heat treatment at lower temperatures mainly the evaporative removal of the big Se particle of the dumbbell structure will take place. Annealing of the smaller particles starts to dominate at temperatures above 240 degrees C and makes the composition of the small particles closer to that of the thermodynamically most favoured In2Se3. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
binary nanoparticle, gas phase generation, In-Se
in
Journal of Nanoscience and Nanotechnology
volume
6
issue
3
pages
600 - 611
publisher
American Scientific Publishers
external identifiers
  • wos:000235941500003
  • pmid:16573110
  • scopus:33645976184
ISSN
1533-4880
DOI
10.1166/jnn.2006.084
language
English
LU publication?
yes
id
9c1f1e56-4f9b-40cb-ba23-635cdd89e570 (old id 416422)
date added to LUP
2007-10-03 08:59:24
date last changed
2019-02-20 04:32:11
@article{9c1f1e56-4f9b-40cb-ba23-635cdd89e570,
  abstract     = {Results on the generation and heat treatment of In-Se nanoparticles, made by heterogeneous condensation of selenium on indium nanoparticles synthesised via the evaporation/condensation route are reported. In-situ aerosol measurements are complemented with ex-situ analysis, to provide structural, morphological, and compositional information on the In-Se nanoparticles. Our results indicate that prior to heat treatment In-Se nanoparticles have a shape in the aerosol phase, similar to an asymmetric dumbbell. The bigger particle of the dumbbell structure is made up of amorphous Se, while the overall composition of the polycrystalline smaller particle is around InSe. The smaller particle has an intrinsic structure, and consists of different InSe-compounds, with a decreasing In content towards the shell. The shape of the In-Se nanoparticles is different in the aerosol phase and on the surface of the samples. The observed variety of particle sizes and shapes on the sample surface is shown to be partly due to the agglomeration of the aerosol phase binaries (i.e., dumbbells) via coalescence on the surface of the sample and wetting of the sample surface by the Se nanoparticles. These processes make the bigger particle of the dumbbell structure appear almost perfectly hemispherical on the sample surfaces. During heat treatment at lower temperatures mainly the evaporative removal of the big Se particle of the dumbbell structure will take place. Annealing of the smaller particles starts to dominate at temperatures above 240 degrees C and makes the composition of the small particles closer to that of the thermodynamically most favoured In2Se3.},
  author       = {Geretovszky, Zsolt and Deppert, Knut and Karlsson, Lisa and Karlsson, Martin and Malm, Jan-Olle and Muhlberg, Manfred},
  issn         = {1533-4880},
  keyword      = {binary nanoparticle,gas phase generation,In-Se},
  language     = {eng},
  number       = {3},
  pages        = {600--611},
  publisher    = {American Scientific Publishers},
  series       = {Journal of Nanoscience and Nanotechnology},
  title        = {Aerosol phase generation of In-Se nanoparticles},
  url          = {http://dx.doi.org/10.1166/jnn.2006.084},
  volume       = {6},
  year         = {2006},
}