Abstract: The pyrrole can be seletively photoelectro-polymerized on substrates, such as Pt, Au, Ag, Cu(1), in neutral aqueous solutions. A clear light point polypyrrole film can be formed bellow the threshold set up for the electropolymerization of pyrrole under normal conditions. This kind of photocatalytic effect is of great interests in preparing the conductive polypyrrole pattern of metal parts, especially in the case of Cu(1) substrate.

Key words: Photoelectrochemical polymerzation, Pyrrol, Metal substrate