Photo-assisted hydrosilylation of silicon nanoparticles: Dependence of particle size on grafting chemistry

Steven Calder, Adam Boies, Pingyan Lei, Steven Girshick, Jeffrey Roberts

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Silicon nanoparticles between 2.5 nm and 30 nm in diameter were functionalized by means of photoassisted hydrosilylation reactions in the aerosol phase with terminal alkenes of varying chain length. Using infrared spectroscopy and nuclear magnetic resonance, the chemical composition of the alkyl layer was determined for each combination of particle size and alkyl chain length. The spectroscopic techniques were used to determine that smaller particles functionalized with short chains in the aerosol phase tend to attach to the interior (β) alkenyl carbon atom, whereas particles >10 nm in diameter exhibit attachment primarily with the exterior (α) alkenyl carbon atom, regardless of chain length.

Original languageEnglish (US)
Pages (from-to)2917-2921
Number of pages5
JournalChemistry of Materials
Volume23
Issue number11
DOIs
StatePublished - Jun 14 2011

Keywords

  • FTIR
  • NMR
  • Silicon nanoparticles
  • aerosol
  • hydrosilylation

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