Fabrication and biofunctionalization of carbon-encapsulated Au nanoparticles

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47 Scopus citations

Abstract

The fabrication of Au@C nanoparticles using a facile chemical vapor deposition (CVD) synthesis and their potential application in bioanalysis was studied. These materials are highly robust and can be produced with a controlled thickness of a graphene-like carbon shell. Dispersed and plasma-oxidized AuNPs on chemically modified Si substrates were used as catalysts for carbon growth. Silane chemistry was used to covalently attach the AuNPs on the Si substrate. oven. The AuNPs on Si substrates were oxidized in an 0 2 plasma process for 15 mm. Dispersed AuNPs were plasma oxidized to remove the initial citrate surface passivant and to partially form gold oxide on the surface, which is critical to the formation of the carbon shells. After CVD growth conditions, formation of a carbon-shell was evident. TEM analysis of these materials show 100% of the observed AuNPs possessed a carbon-shell, indicating that partial oxidation of the AuNP surface is required to catalyze the carbon growth.

Original languageEnglish (US)
Pages (from-to)1176-1178
Number of pages3
JournalChemistry of Materials
Volume21
Issue number7
DOIs
StatePublished - Apr 14 2009
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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