Quartz Crystal Microbalance Study: Ionic Motion Across Conducting Polymers

Katsuhiko Naoi, Mary Lien, William H. Smyrl

Research output: Contribution to journalArticle

263 Scopus citations

Abstract

In situ monitoring of mass change was performed during electrochemical growth and redox cycling of a conducting polymer(polypyrrole) on a quartz crystal microbalance. For the polypyrrole films grown with large polymeric anions(poly(4-styrenesulfonate) and polyvinylsulfonate), mostly cations and solvent molecules were inserted and removedto compensate charge in polypyrrole. The films formed with medium-sized anions (tosylate) showed both apparent anion and cation motion during the redox process. The films prepared in the presence of small anions (C1O4-and BF4) showed mostly anion motion, but apparent cation motion also became significant for higher oxidation and/or reduction state.

Original languageEnglish (US)
Pages (from-to)440-445
Number of pages6
JournalJournal of the Electrochemical Society
Volume138
Issue number2
DOIs
StatePublished - Feb 1991

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