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Evaporation and deposition of alkyl-capped silicon nanocrystals in ultrahigh vacuum

Chao, Yimin; Iller, Lidija S.; Krishnamurthy, Satheesh; Coxon, Paul R.; Bangert, Ursel; Gass, Mhairi; Kjeldgaard, Lisbeth LU ; PatoleO, Samson N.; Lie, Lars H. and O'Farrell, Norah, et al. (2007) In Nature Nanotechnology 2(8). p.486-489
Abstract
Nanocrystals are under active investigation because of their interesting size- dependent properties(1,2) and potential applications(3-5). Silicon nanocrystals have been studied for possible uses in optoelectronics(6), and may be relevant to the understanding of natural processes such as lightning strikes(7). Gas-phase methods can be used to prepare nanocrystals, and mass spectrometric techniques have been used to analyse Au-8,(9) and CdSe clusters(10). However, it is difficult to study nanocrystals by such methods unless they are synthesized in the gas phase(11). In particular, pre-prepared nanocrystals are generally difficult to sublime without decomposition. Here we report the observation that films of alkyl-capped silicon nanocrystals... (More)
Nanocrystals are under active investigation because of their interesting size- dependent properties(1,2) and potential applications(3-5). Silicon nanocrystals have been studied for possible uses in optoelectronics(6), and may be relevant to the understanding of natural processes such as lightning strikes(7). Gas-phase methods can be used to prepare nanocrystals, and mass spectrometric techniques have been used to analyse Au-8,(9) and CdSe clusters(10). However, it is difficult to study nanocrystals by such methods unless they are synthesized in the gas phase(11). In particular, pre-prepared nanocrystals are generally difficult to sublime without decomposition. Here we report the observation that films of alkyl-capped silicon nanocrystals evaporate upon heating in ultrahigh vacuum at 200 degrees C, and the vapour of intact nanocrystals can be collected on a variety of solid substrates. This effect may be useful for the controlled preparation of new quantum-confined silicon structures and could facilitate their mass spectroscopic study and size- selection(12). (Less)
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Contribution to journal
publication status
published
subject
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Nature Nanotechnology
volume
2
issue
8
pages
486 - 489
publisher
Nature Publishing Group
external identifiers
  • wos:000249062900012
  • scopus:34547664722
ISSN
1748-3395
DOI
10.1038/nnano.2007.224
language
English
LU publication?
yes
id
9642a69e-85ef-46f8-8ba3-d1f0b61e8de7 (old id 687704)
date added to LUP
2007-12-11 16:55:34
date last changed
2017-10-01 03:58:33
@article{9642a69e-85ef-46f8-8ba3-d1f0b61e8de7,
  abstract     = {Nanocrystals are under active investigation because of their interesting size- dependent properties(1,2) and potential applications(3-5). Silicon nanocrystals have been studied for possible uses in optoelectronics(6), and may be relevant to the understanding of natural processes such as lightning strikes(7). Gas-phase methods can be used to prepare nanocrystals, and mass spectrometric techniques have been used to analyse Au-8,(9) and CdSe clusters(10). However, it is difficult to study nanocrystals by such methods unless they are synthesized in the gas phase(11). In particular, pre-prepared nanocrystals are generally difficult to sublime without decomposition. Here we report the observation that films of alkyl-capped silicon nanocrystals evaporate upon heating in ultrahigh vacuum at 200 degrees C, and the vapour of intact nanocrystals can be collected on a variety of solid substrates. This effect may be useful for the controlled preparation of new quantum-confined silicon structures and could facilitate their mass spectroscopic study and size- selection(12).},
  author       = {Chao, Yimin and Iller, Lidija S. and Krishnamurthy, Satheesh and Coxon, Paul R. and Bangert, Ursel and Gass, Mhairi and Kjeldgaard, Lisbeth and PatoleO, Samson N. and Lie, Lars H. and O'Farrell, Norah and Alsop, Thomas A. and Houlton, Andrew and Horrocks, Benjamin R.},
  issn         = {1748-3395},
  language     = {eng},
  number       = {8},
  pages        = {486--489},
  publisher    = {Nature Publishing Group},
  series       = {Nature Nanotechnology},
  title        = {Evaporation and deposition of alkyl-capped silicon nanocrystals in ultrahigh vacuum},
  url          = {http://dx.doi.org/10.1038/nnano.2007.224},
  volume       = {2},
  year         = {2007},
}