In situ STM study of the counterion effect on the doping stages of polypyrrole films

被引:19
作者
Chaînet, E [1 ]
Billon, M [1 ]
机构
[1] Univ Grenoble 1, ENSEEG, UMR CNRS 5631, Lab Electrochim & Physicochim Mat & Interfaces, F-38402 St Martin Dheres, France
关键词
polypyrrole film; electrodoping; counterion;
D O I
10.1016/S0379-6779(98)00181-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The swelling (or deswelling) of a polypyrrole film due to the electrodoping has been investigated by scanning tunneling microscopy (STM) in order to correlate the surface morphological variations with the electroactivity of the film evaluated through its voltamperometric response. Different anions have been used and the results obtained show a remarkable correlation between the magnitude of topographical features and the film electroactivity according to the physicochemical nature of counterions. Moreover the inclusion of anions in the polymer matrix during the electrodoping induced strong morphological transformations in a micrometer scale. These experiments were performed in situ so as to reflect the solvation of the polypyrrole film and the counterions. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:21 / 26
页数:6
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