In situ cyclic voltammetry-surface-enhanced Raman spectroscopy: Studies on the doping-undoping of polypyrrole film

Yu Chuan Liu, Bing Joe Hwang, Wen Jie Jian, Raman Santhanam

研究成果: 雜誌貢獻文章同行評審

135 引文 斯高帕斯(Scopus)

摘要

The redox behavior of polypyrrole (PPy) film in 0.2 M aqueous KNO3 solution was investigated by cyclic voltammetry (CV) in situ surface-enhanced Raman spectroscopy (SERS). The results show that the Raman intensity of C double bond C backbone stretching decreases and increases regularly with the anodic and cathodic scans, respectively, owing to the change of surface roughness and the possibility of state transition. The peak position of C-H in-plane deformation remains unchanged both in anodic and cathodic scans. Furthermore, the peak positions of N-H in-plane deformation and ring deformation shift to lower and higher wavenumbers with anodic and cathodic scans, respectively. Also the Raman peak of the NO3 - dopant ions appears significant when PPy is in a more oxidized state.

原文英語
頁(從 - 到)85-91
頁數7
期刊Thin Solid Films
374
發行號1
DOIs
出版狀態已發佈 - 十月 3 2000
對外發佈Yes

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

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