Synthesis and characterization of Ag/PPy composite films via enhanced redox reaction of metal ions

A facile approach to the formation of Ag/PPy composite film, through the reaction of Ag+ and pyrrole monomer, was developed with the help of synergistic effect of NH3·H2O on this reaction. Black or gray Ag/PPy film precipitated on the insert wall of the vessel within 0.5 h with this new method. The Ag/PPy composite film has good conductivity (sheet resistance: 0.28 Ω/square) and superhydrophility (contact angle of water, CAW ∼0°). Mechanism involved in the reaction rate acceleration was briefly discussed.