Mechanistic study of photomediated triangular silver nanoprism growth

Can Xue, Gabriella S. Métraux, Jill E. Millstone, Chad A. Mirkin

Research output: Contribution to journalArticlepeer-review

305 Scopus citations

Abstract

This article presents a mechanistic study of the photomediated growth of silver nanoprisms. The data show that the photochemical process is driven by silver redox cycles involving reduction of silver cations by citrate on the silver particle surface and oxidative dissolution of small silver particles by O2. Bis(p-sulfonatophenyl)phenylphosphine increases the solubility of the Ag+ by complexing it and acts as a buffer to keep the concentration of Ag+ at 20 μM. The silver particles serve as photocatalysts and, under plasmon excitation, facilitate Ag+ reduction by citrate. Higher Ag+ concentrations favor a competitive thermal process, which results in increased prism thickness.

Original languageEnglish (US)
Pages (from-to)8337-8344
Number of pages8
JournalJournal of the American Chemical Society
Volume130
Issue number26
DOIs
StatePublished - Jul 2 2008

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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