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

Chao, Yimin; Šiller, Lidija; Krishnamurthy, Satheesh; Coxon, Paul R.; Bangert, Ursel; Gass, Mhairi; Kjeldgaard, Lisbeth; Patole, Samson N.; Lie, Lars H.; O'Farrell, Norah; Alsop, Thomas A.; Houlton, Andrew and Horrocks, Benjamin R. (2007). Evaporation and deposition of alkyl-capped silicon nanocrystals in ultrahigh vacuum. Nature Nanotechnology, 2(8) pp. 486–489.

URL: http://www.scopus.com/inward/record.url?eid=2-s2.0...
DOI (Digital Object Identifier) Link: https://doi.org/10.1038/nnano.2007.224
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Abstract

Nanocrystals are under active investigation because of their interesting size-dependent properties and potential applications. Silicon nanocrystals have been studied for possible uses in optoelectronics, and may be relevant to the understanding of natural processes such as lightning strikes. Gas-phase methods can be used to prepare nanocrystals, and mass spectrometric techniques have been used to analyse Au and CdSe clusters. However, it is difficult to study nanocrystals by such methods unless they are synthesized in the gas phase. 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 °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

Item Type: Journal Item
Copyright Holders: 2007 Nature Publishing Group
ISSN: 1748-3395
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetEPSRC (Engineering and Physical Sciences Research Council)
Not SetNot SetCeNAMPs
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 35396
Depositing User: Satheesh Krishnamurthy
Date Deposited: 25 Apr 2013 09:29
Last Modified: 07 Dec 2018 10:10
URI: http://oro.open.ac.uk/id/eprint/35396
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