Solution Synthesis of Alkyl- and Alkyl/Alkoxy-Capped Silicon Nanoparticles via Oxidation of Mg2Si

Katherine A. Pettigrew, Qi Liu, Philip P. Power, Susan M. Kauzlarich

Research output: Contribution to journalArticle

145 Scopus citations

Abstract

Alkyl-capped and alkyl/alkoxy-capped silicon nanocrystals have been prepared by the oxidation of magnesium silicide with bromine. High-resolution transmission electron microscopy confirmed the crystalline nature of the nanoparticles and provided an average diameter of 4.5 (2.0) nm for the alkyl-capped and for the alkyl/alkoxy-capped nanoparticles. Energy-dispersive X-ray spectroscopy showed that the nanoparticles are composed of silicon, with no evidence of unreacted bromine. FTIR spectra were consistent with alkyl- and alkyl/alkoxy-capped surfaces. Fluorescence spectroscopy indicated strong ultraviolet-blue photoluminescence, which was attributed to both quantum confinement and surface termination. These nanoparticles displayed long-term stability and no degradation of the photoluminescence was observed for a period of 1 year.

Original languageEnglish (US)
Pages (from-to)4005-4011
Number of pages7
JournalChemistry of Materials
Volume15
Issue number21
DOIs
StatePublished - Oct 21 2003

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

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