ゾル-ゲル法を用いたポリピロール-シリカガラス複合膜の作製とその電気化学的性質

抄録

Polypyrrole (PPy)-silica glass composite films were prepared by carrying out the electrochemical polymerization of PPy simultaneously with the synthesis of silica glass by using the sol-gel processing and its electrochemical doping properties have been investigated by cyclic voltammetry. These films could be electrochemically easily doped and the undoped and doped states were yellow and blue in color, respectively. The redox process of PPy-silica glass has been gradually activated by repeating the electrochemical dopingundoping cycles. It was found that dopant anions in the PPy-silica glass composite film could be exchanged relatively easily with electrolyte anions in acetonitrile solution by potential sweeping. However, dopant anions in the PPy film cound not be easily exchanged in acetonitrile solution. Finally, application of this new type of PPy-silica glass composite film to the ionic sensor which responds to specific ions has also been proposed.