Enhancements in conductivity and Raman spectroscopy of polypyrrole electropolymerized on electrochemically roughened Au substrates

Yu Chuan Liu, Kuang Hsuan Yang, Cheng C. Wang

Research output: Contribution to journalArticle

13 Citations (Scopus)


In this study, gold substrates were first roughened by a triangular-wave oxidation-reduction cycle (ORC) in an aqueous solution containing 0.1 N HCl, and then polypyrrole (PPy) films were electrochemically deposited on the roughened gold substrates. In ORC treatment, Au- and Cl-containing complexes with nanostructure were formed on the surface of gold. The nanocomplexes show a catalytic electroxidation pathway for the polymerization of PPy. The characteristics of PPy deposited on this roughened Au are distinct from those of PPy deposited on the polished Au without further ORC treatment. They include the demonstration of the surface-enhanced Raman scattering effect, a higher conductivity and an increase in oxidation level of the prepared PPy.

Original languageEnglish
Pages (from-to)151-155
Number of pages5
JournalJournal of Electroanalytical Chemistry
Issue numberSUPPL.
Publication statusPublished - Jun 5 2003
Externally publishedYes



  • Conducting polymer
  • Conductivity
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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