ELECTROCHEMICAL PROPERTIES OF DODECYL-SULFATE DOPED POLYPYRROLE FILMS

The electrochemical behavior of dodecylsulphate (DDS) as a surfaceactive dopant of conducting polymer was studied. High selectivity of incorporation of the DDS into the growing polypyrrole film during the anodic polymerization was observed. The DDS ions are firmly fixed and cannot escape from the film and as the oxidation state of the polypyrrole is changed, other ions migrate into or out of the film. ExtremeLy high kinetic resistance of the first reduction process is typical of the DDS doped polypyrrole. The incorporation of cations during the first cycle drastically changes the electrochemical properties of the film.