Shape control of gold nanoparticles by silver underpotential deposition

Michelle L. Personick, Mark R. Langille, Jian Zhang, Chad A. Mirkin

Research output: Contribution to journalArticle

250 Scopus citations

Abstract

Four different gold nanostructures: octahedra, rhombic dodecahedra, truncated ditetragonal prisms, and concave cubes, have been synthesized using a seed-mediated growth method by strategically varying the Ag+ concentration in the reaction solution. Using X-ray photoelectron spectroscopy and inductively coupled plasma atomic emission spectroscopy, we provide quantitative evidence that Ag underpotential deposition is responsible for stabilizing the various surface facets that enclose the above nanoparticles. Increasing concentrations of Ag+ in the growth solution stabilize more open surface facets, and experimental values for Ag coverage on the surface of the particles fit well with a calculated monolayer coverage of Ag, as expected via underpotential deposition.

Original languageEnglish (US)
Pages (from-to)3394-3398
Number of pages5
JournalNano Letters
Volume11
Issue number8
DOIs
StatePublished - Aug 10 2011

Keywords

  • Anisotropic nanostructures
  • gold
  • seed-mediated synthesis
  • silver
  • underpotential deposition

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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