Attenuation of surface-enhanced Raman spectroscopy response in gold-platinum core-shell nanoparticles

Nolan T. Flynn, Andrew A Gewirth

Research output: Contribution to journalArticlepeer-review

Abstract

Colloidal gold particles (11.2 nm) were coated with platinum overlayers, resulting in bimetallic particles with 1-8 mol% Pt. These particles were characterized using electron microscopy, energy-dispersive x-ray spectroscopy and electrochemistry confirming the Au-Pt core-shell structure. The UV-visible spectra showed only minimal red shifts with increasing Pt content. The Raman spectra, on the other hand, changed dramatically with slight increases in Pt, resulting in a loss of appreciable surface-enhancement effects by 4 mol% Pt.

Original languageEnglish (US)
Pages (from-to)243-251
Number of pages9
JournalJournal of Raman Spectroscopy
Volume33
Issue number4
DOIs
StatePublished - Jul 2 2002

ASJC Scopus subject areas

  • Materials Science(all)
  • Spectroscopy

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