Polyaniline thin films in situ polymerized under very high pressure

The conducting PANI films with network morphology were synthesized on glass substrate by in situ polymerization under various very high pressures (>108 Pa). The effects of applied pressure on films were investigated by using UV-vis absorption spectroscopy, SEM, film thickness measurement and conductivity measurement. The high pressure used in polymerization played an important role in the formation of PANI films. Inferred from the analysis of our experimental results, there was a competition between the adsorption and transference of the cation radicals during the initial growth of films under high pressure. The applied high pressure was favorable to improve the conjugation length in PANI and/or electrical contacts between the fibrils in network of PANI films.