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

Citation
E. Chainet et M. Billon, In situ STM study of the counterion effect on the doping stages of polypyrrole films, SYNTH METAL, 99(1), 1999, pp. 21-26
Citations number
21
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779 → ACNP
Volume
99
Issue
1
Year of publication
1999
Pages
21 - 26
Database
ISI
SICI code
0379-6779(19990129)99:1<21:ISSSOT>2.0.ZU;2-F
Abstract
The swelling (or deswelling) of a polypyrrole film due to the electrodoping has been investigated by scanning tunneling microscopy (STM) in order to c orrelate the surface morphological variations with the electroactivity of t he film evaluated through its voltamperometric response. Different anions h ave been used and the results obtained show a remarkable correlation betwee n the magnitude of topographical features and the film electroactivity acco rding to the physicochemical nature of counterions. Moreover the inclusion of anions in the polymer matrix during the electrodoping induced strong mor phological transformations in a micrometer scale. These experiments were pe rformed in situ so as to reflect the solvation of the polypyrrole film and the counterions. (C) 1999 Elsevier Science S.A. All rights reserved.