Contributions of cationic and elemental gold on roughened gold substrates to surface-enhanced Raman scattering

Chung Chin Yu, Yu Chuan Liu

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10 Citations (Scopus)

Abstract

In this work, the contributions of cationic and elemental gold on roughened gold substrates to surface-enhanced Raman scattering (SERS) of polypyrrole (PPy) films were first investigated. First, a gold substrate was roughened by a triangular wave oxidation-reduction cycle (ORC) in an aqueous solution containing 0.1 M KCl. Then, the roughened gold substrate was further reduced by applying a cathodic potential for a fixed time to control the quantity of unreduced cationic Au on the roughened Au substrate. The result indicates that the content of cationic Au is responsible for the improved SERS of PPy electrodeposited on this roughened Au substrate. This phenomenon can be attributed to the interfacial charge transfer from PPy to the roughened Au substrate by the aid of cationic Au.

Original languageEnglish
Pages (from-to)130-135
Number of pages6
JournalAnalytica Chimica Acta
Volume566
Issue number1
DOIs
Publication statusPublished - Apr 27 2006
Externally publishedYes

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Keywords

  • Cationic Au
  • Polypyrrole
  • Surface-enhanced Raman scattering

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

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