A1 Refereed original research article in a scientific journal
Change from a bulk to a surface coupling mechanism in the electrochemical polymerization of thiophene
Authors: Visy C, Lukkari J, Kankare J
Publisher: ELSEVIER SCIENCE SA LAUSANNE
Publication year: 1997
Journal:: Synthetic Metals
Journal name in source: SYNTHETIC METALS
Journal acronym: SYNTHETIC MET
Volume: 87
Issue: 1
First page : 81
Last page: 87
Number of pages: 7
ISSN: 0379-6779
DOI: https://doi.org/10.1016/S0379-6779(97)80101-4
Abstract
The electrochemical polymerization of thiophene has been studied by spectrovoltammetric, spectrogalvanostatic 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.
The electrochemical polymerization of thiophene has been studied by spectrovoltammetric, spectrogalvanostatic 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.
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