Sandwiched structure of Ag/polypyrrole/Au to improve the surfaced-enhanced Raman scattering

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8 引文 斯高帕斯(Scopus)

摘要

In this study, an increased surfaced-enhanced Raman scattering (SERS) of polypyrrole (PPy) based on a sandwiched structure of Ag/PPy/Au was first observed. First, a gold substrate was roughened by a triangular-wave oxidation-reduction cycle (ORC) in an aqueous solution containing 0.1 N KCl. Then, pyrrole (Py) monomers were autopolymerized on the roughened Au substrate due to the electrochemical activity of the species formed on the roughened Au substrate. Extending the application of self-assembled monolayers, silver monolayers were further adsorbed onto PPy films by dipping the PPy-deposited Au substrate into an Ag complex-containing solution, which was produced from roughening a silver substrate by using a similar ORC procedure employed in roughening the gold substrate. Encouragingly, the SERS spectroscopy of PPy with this sandwiched structure, Ag/PPy/Au, exhibits a higher intensity by 15-fold of magnitude and a better resolution, as compared with the normal SERS of PPy deposited on a roughened Au substrate. The enhanced SERS effects can be explained as both the electromagnetic one and the chemical one.

原文英語
頁(從 - 到)1071-1076
頁數6
期刊Electrochemistry Communications
7
發行號10
DOIs
出版狀態已發佈 - 十月 2005
對外發佈

ASJC Scopus subject areas

  • 化學工程 (全部)
  • 分析化學
  • 電化學

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