In situ dc conductivity study of the redox transformations and relaxation of polyaniline films

E. Csahók, E. Vieil, G. Inzelt

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

The insulator to conductor and conductor to insulator conversions of polyaniline have been studied by the in situ conductivity technique. Polyaniline was deposited by electropolymerization of aniline connecting two or more bands of gold electrodes. The gap between two gold stripes was 2 μm. Slow relaxation and hysteresis effects have been observed in different electrolyte solutions in the temperature interval from 5 to 45 °C. The duration of the change of the resistance after a potential step is small (tens of seconds) in the potential region where the film is conducting, however, the relaxation may last for hours during conducting to insulating transitions. In the latter case, the behavior does not obey a simple logarithmic relaxation because at least two distinct slopes can be determined in the R versus ln t curves. The conductivity relaxation is in accordance with the previous results obtained by other techniques and can be explained by the existing theories.

Original languageEnglish
Pages (from-to)168-177
Number of pages10
JournalJournal of Electroanalytical Chemistry
Volume482
Issue number2
DOIs
Publication statusPublished - Mar 20 2000

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Polyaniline
Gold
Conductive films
Electropolymerization
Aniline
Electrolytes
Hysteresis
Electrodes
Temperature
Oxidation-Reduction
polyaniline
aniline

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

In situ dc conductivity study of the redox transformations and relaxation of polyaniline films. / Csahók, E.; Vieil, E.; Inzelt, G.

In: Journal of Electroanalytical Chemistry, Vol. 482, No. 2, 20.03.2000, p. 168-177.

Research output: Contribution to journalArticle

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