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http://dx.doi.org/10.5229/JKES.2002.5.3.143

In-situ EQCM Study on Growth of Polypyrrole Films Using Gold Electrodes Modified with Self-Assembled Monolayers in an Aqueous Solution  

Seo, Kyoung--Ja (Department of Chemicstry, Chonbuk National University)
Jeon, Il-Cheol (Department of Chemicstry, Chonbuk National University)
Publication Information
Journal of the Korean Electrochemical Society / v.5, no.3, 2002 , pp. 143-152 More about this Journal
Abstract
The growth of Polypyrrole film has been investigated during electropolymerization in an aqueous solution on bare and SAM modified gold electrodes by in-situ EQCM and ex-situ AFM. According to the result of cyclic voltammetry measurements, in the case of a bare gold electrode, the electrochemical deposition of polypyrrole were dependent on the limiting oxidative potential, but not on scan numbers. When the limiting potential higher than 0.8 V was applied on the electrode, the amount of polypyrrole deposited on a gold electrode was rapidly increased and the abnormal mass change attributed to the rearrangement of polypyrrole films was observed as the scan number increased. The polypyrrole film Prepared on electrodes modified with 1-dodecanethiol SAM or thiophene SAM grew 3-dimensionally with the rearrangement of film. However, in the case of BPUS SAM, 2-dimensional layer-by-layer growth of film was observed without the rearrangement of film. AFM images showed films with chain-shaped and/ or donut-shaped polymers when grown rapidly and a wrinkled film at the steady state condition.
Keywords
Self-Assembled Monolayer; EQCM; Polypyrrole; AFM;
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