ELECTROCHEMICAL PROPERTIES OF DODECYL-SULFATE DOPED POLYPYRROLE FILMS

The electrochemical behavior of dodecylsulphate (DDS) as a surfaceacti ve dopant of conducting polymer was studied. High selectivity of incor poration of the DDS into the growing polypyrrole film during the anodi c polymerization was observed. The DDS ions are firmly fixed and canno t escape from the film and as the oxidation state of the polypyrrole i s changed, other ions migrate into or out of the film. ExtremeLy high kinetic resistance of the first reduction process is typical of the DD S doped polypyrrole. The incorporation of cations during the first cyc le drastically changes the electrochemical properties of the film.