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

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

The redox behavior of polypyrrole (PPy) film in 0.2 M aqueous KNO 3 solution was investigated by cyclic voltammetry (CV) in situ surface-enhanced Raman spectroscopy (SERS). The results show that the Raman intensity of CC backbone stretching decreases and increases regularly with the anodic and cath...

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Veröffentlicht in:Thin solid films 2000-10, Vol.374 (1), p.85-91
Hauptverfasser: Liu, Yu-Chuan, Hwang, Bing-Joe, Jian, Wen-Jie, Santhanam, Raman
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Cyclic voltammetry
Doping–undoping
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polypyrrole
Properties and characterization
Surface-enhanced Raman spectroscopy
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container_end_page 91
container_issue 1
container_start_page 85
container_title Thin solid films
container_volume 374
creator Liu, Yu-Chuan
Hwang, Bing-Joe
Jian, Wen-Jie
Santhanam, Raman
description The redox behavior of polypyrrole (PPy) film in 0.2 M aqueous KNO 3 solution was investigated by cyclic voltammetry (CV) in situ surface-enhanced Raman spectroscopy (SERS). The results show that the Raman intensity of C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 NO 3 − dopant ions appears significant when PPy is in a more oxidized state.
doi_str_mv 10.1016/S0040-6090(00)01061-0
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subjects Applied sciences
Cyclic voltammetry
Doping–undoping
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polypyrrole
Properties and characterization
Surface-enhanced Raman spectroscopy
title In situ cyclic voltammetry-surface-enhanced Raman spectroscopy: studies on the doping–undoping of polypyrrole film
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