Quartz Crystal Microbalance Study: Ionic Motion Across Conducting Polymers

submitted to J. Electrochm. Soc. •7 COSATI CZOES I8. SU81ECT TERMS Connnue on rovers * if necessary ami,oentify ay Oiocr riumoer) rlo GROUP SUB-GROUP quartz crystal microbalance, QCM, conducting polymer, polypyrrole, redox polymer 19. ABSTRACT (Continue on revers * if necessary amia nah by o0cx iumocr) In-situ monitoring of ffiass 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 aniofs (poly(4-styrenesulfonate) and poly-vinylsulfonate), mostly cations and solvent molecules were inserted and removed to compensate charge in polypyrrole. The films formed with medium sized anions (tosylate) showed both anion and cation motion during the redox process. The films prepared in the presence of small anions (-CO 4- and RF4-) showed mostly anion motion, but cation motio