Change from a bulk to a surface coupling mechanism in the electrochemical polymerization of thiophene

Csaba Visy, Jukka Lukkari, Jouko Kankare

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The electrochemical polymerization of thiophene has been studied by spectrovoltammetric, spectrogal vanostatic and electrochemical quartz-crystal microbalance (EQCM) techniques. Experimental support was found for a change from a bulk to a surface coupling mechanism during the process at weakly adsorbing electrodes like indium-tin oxide (ITO). This conclusion has gained further proof from experiments in connection with the effect of a strong deprotonating agent (DBN). It was observed that the solution phase inhibitor is inefficient when it was added only during the process, when the surface had already been covered by a prepolymerized layer. The film formation undisturbed by the late addition of the inhibitor was illustrated by evidence obtained from spectroelectrochemical and EQCM measurements.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalSynthetic Metals
Volume87
Issue number1
DOIs
Publication statusPublished - Feb 15 1997

Keywords

  • Coupling mechanism
  • Electropolymerization
  • Polythiophene
  • Weakly adsorbing electrode

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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