Nanoshells made easy: improving Au layer growth on nanoparticle surfaces

Bruce E Brinson, J Britt Lassiter, Carly S Levin, Rizia Bardhan, Nikolay Mirin, Naomi J. Halas

Research output: Contribution to journalReview article

181 Scopus citations

Abstract

The growth of a continuous, uniform Au layer on a dielectric nanoparticle is the critical step in the synthesis of nanoparticles such as nanoshells or nanorice, giving rise to their unique geometry-dependent plasmon resonant properties. Here, we report a novel, streamlined method for Au layer metallization on prepared nanoparticle surfaces using carbon monoxide as the reducing agent. This approach consistently yields plasmonic nanoparticles with highly regular shell layers and is immune to variations in precursor or reagent preparation. Single particle spectroscopy combined with scanning electron microscopy reveal that thinner, more uniform shell layers with correspondingly red-shifted optical resonances are achievable with this approach.

Original languageEnglish (US)
Pages (from-to)14166-71
Number of pages6
JournalLangmuir
Volume24
Issue number24
DOIs
StatePublished - Dec 16 2008

Keywords

  • Gold
  • Metal Nanoparticles
  • Microscopy, Electron, Scanning
  • Surface Plasmon Resonance
  • Surface Properties
  • Journal Article
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

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