In situ electrochemical ESR investigations of the growth of one- and two-dimensional polypyrrole films

J. Bacskai, G. Inzelt, A. Bartl, L. Dunsch, G. Paasch

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Abstract

In situ ESR-spectroscopic investigations of the electrochemical growth of polypyrrole (PPy) in 0.1 mol dm-3 toluene sulfonic acid solutions in acetonitrile are presented. The films were deposited potentiostatically and galvanostatically onto gold electrodes. ESR spectra were simultaneously recorded during electrodeposition processes at high and low current densities, respectively. Differences in the paramagnetic properties of the PPy films thus prepared have been observed depending on the applied current densities. Furthermore, the spin concentration in the PPy film is not proportional to the injected charge. Therefore, two different mechanisms of film formation occur depending on the applied current densities.

Original languageEnglish
Pages (from-to)227-230
Number of pages4
JournalSynthetic Metals
Volume67
Issue number1-3
DOIs
Publication statusPublished - Nov 1994

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Keywords

  • Electrochemistry
  • Electron spin resonance
  • Films
  • Polypyrrole

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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