Magneto-electropolymerization of conducting polypyrrole

Magnetic fields were applied to the electropolymerization process of an organic conducting polymer polypyrrole. The magneto-electropolymerization was carried out in a cryocooler-cooled superconducting magnet and a Bitter magnet. The magnetic fields shifted the cathodic peak to more negative potentials in the cyclic voltammogram of the polypyrrole film. Such an effect was remarkable at higher anodic polymerization potentials. The magneto-electropolymerized film exhibited a relaxation phenomenon in the cyclic voltammogram during immersion of the film in an aqueous solution. These results demonstrated that the magneto-electropolymerization allows control of the electrochemical properties of polypyrrole.