Study on the NH3-gas sensitive properties and sensitive mechanism of polypyrrole

In this paper, submicrometer thin film of polypyrrole is prepared by electrolytic polymerization method. The best technological condition of preparing the submicrometer NH3-gas sensitive polypyrrole thin film is found by researching into the technological parameters of electrolytic polymerization. The NH3-gas sensitivity of polypyrrole is studied and the microstructure of this material is also discussed. Finally, adopting semiconductor theory, the NH3-gas sensitive mechanism of polypyrrole is extensively studied.