Effect of TiO2 nanoparticles on the improved surface-enhanced raman scattering of polypyrrole deposited on roughened gold substrates

Yu Chuan Liu, Ping I. Lin, Yit Tsong Chen, Ming Der Ger, Kuo Lung Lan, Chih Lung Lin

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We report here the first electrochemical oxidation-reduction cycle procedure to roughen gold substrates in 0.1 N HCl aqueous solution containing 1 mM rutile TiO2 nanoparticles under the irradiation of UV light. It is encouraging to find that the oxidized peak in the anodic scan, which is responsible for the surface-enhanced Raman scattering, increases significantly due to the effect of adding TiO2 under an electric field and UV irradiation. Moreover, the SERS spectrum of polypyrrole electrodeposited on the corresponding roughened gold substrate exhibits a 5-fold higher intensity compared to that without the contribution of TiO2 nanoparticles.

Original languageEnglish
Pages (from-to)14897-14900
Number of pages4
JournalJournal of Physical Chemistry B
Volume108
Issue number39
DOIs
Publication statusPublished - Sep 30 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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