Abstract
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.
Original language | English |
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Pages (from-to) | 85-91 |
Number of pages | 7 |
Journal | Thin Solid Films |
Volume | 374 |
Issue number | 1 |
DOIs | |
Publication status | Published - Oct 3 2000 |
Externally published | Yes |
ASJC Scopus subject areas
- Surfaces, Coatings and Films
- Condensed Matter Physics
- Surfaces and Interfaces