DTIC ADA196011: Virtues of Composite Structures in pdf

DTIC ADA196011: Virtues of Composite Structures in

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Poly(aniline) (PA) is electropolymerized within thin films of precast Nafion on gold or glassy carbon electrodes. The quartz crystal microbalance (QCM) is used to aid in identification of the ionic species which undergo transport during switching of the PA between its insulating and conducting forms. The QCM frequency changes observed in solutions containing various cationic species suggest that cation transport is dominant for these composite structures. In acidic solution, a consequence of the high transport number for the proton in the composite films is shown to be an enhanced switching rate relative to the simple (non-composite) PA film. The composite PA films appear to be less resistive and therefore more electrochemically well behaved over a wider pH range than the simple PA films. Keywords: Electrochemistry, Quartz crystal microbalance, Conducting polymer, Modified electrode

• Creator/s: Defense Technical Information Center
• Date: 7/9/1988
• Year: 1988
• Book Topics/Themes: DTIC Archive, Orata, Duke O, WYOMING UNIV LARAMIE DEPT OF CHEMISTRY, *POLYMERS, *ANILINES, *COMPOSITE MATERIALS, MODIFICATION, THIN FILMS, FILMS, RATES, ELECTROCHEMISTRY, COMPOSITE STRUCTURES, SOLUTIONS(GENERAL), ELECTRODES, TRANSPORT, SWITCHING, PH FACTOR, ACIDS, CATIONS, GLASSY CARBON, FREQUENCY, IONS

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