DOPING DEDOPING OF POLYPYRROLE - A STUDY USING CURRENT-MEASURING AND RESISTANCE-MEASURING TECHNIQUES

Two techniques, namely cyclic voltammetry with microelectrodes, and cyclic resistometry, have been used to investigate the nature of the doping-dedoping processes occurring at polypyrrole. Both studies confirm that the cation plays a significant role in these processes. The use of microelectrodes with cyclic voltammetry enables distinct cation responses to be observed, while the use of resistometry shows the effect of the cation in determining the polymer resistance at negative potentials.