A new solution route to hydrogen-terminated silicon nanoparticles: Synthesis, functionalization and water stability

Xiaoming Zhang, Doinita Neiner, Shizhong Wang, Angelique Y. Louie, Susan M. Kauzlarich

Research output: Contribution to journalArticle

116 Scopus citations

Abstract

Hydrogen-capped silicon nanoparticles with strong blue photoluminescence were synthesized by the metathesis reaction of sodium silicide, NaSi, with NH4Br. The hydrogen-capped Si nanoparticles were further terminated with octyl groups and then coated with a polymer to render them water-soluble. The nanoparticles were characterized by TEM, FT-IR, UV-vis absorption and photoluminescence. The Si nanoparticles were shown to have an average diameter of 3.9 ± 1.3 nm and exhibited room temperature photoluminescence with a peak maximum at 438 nm with a quantum efficiency of 32% in hexane and 18% in water; the emission was stable in ambient air for up to 2 months. These nanoparticles could hold great potential as a non-heavy-element-containing quantum dot for applications in biology.

Original languageEnglish (US)
Article number095601
JournalNanotechnology
Volume18
Issue number9
DOIs
StatePublished - Mar 7 2007

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ASJC Scopus subject areas

  • Materials Science(all)
  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials

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