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 |
|---|---|
| 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 |
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ASJC Scopus subject areas
- Surfaces, Coatings and Films
- Condensed Matter Physics
- Surfaces and Interfaces
Cite this
In situ cyclic voltammetry-surface-enhanced Raman spectroscopy : Studies on the doping-undoping of polypyrrole film. / Liu, Yu Chuan; Hwang, Bing Joe; Jian, Wen Jie; Santhanam, Raman.
In: Thin Solid Films, Vol. 374, No. 1, 03.10.2000, p. 85-91.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - In situ cyclic voltammetry-surface-enhanced Raman spectroscopy
T2 - Studies on the doping-undoping of polypyrrole film
AU - Liu, Yu Chuan
AU - Hwang, Bing Joe
AU - Jian, Wen Jie
AU - Santhanam, Raman
PY - 2000/10/3
Y1 - 2000/10/3
N2 - 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.
AB - 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.
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U2 - 10.1016/S0040-6090(00)01061-0
DO - 10.1016/S0040-6090(00)01061-0
M3 - Article
VL - 374
SP - 85
EP - 91
JO - Thin Solid Films
JF - Thin Solid Films
SN - 0040-6090
IS - 1
ER -