Influence of high-energy electron irradiation on the conduction behavior of doped polyaniline films in the high current density regime

The influence of high-energy electron irradiation on the conduction behavio r at high current density of polyaniline (PANI) films doped with HCl and ca mphor sulfonic acid (HCSA), respectively, is reported. It is found that the re exists an ohmic region under certain current density for both non-irradi ated and irradiated samples. No significant change of the conductivity and maximum current density are observed if the sample is irradiated at room te mperature and low dosage. The conductivity and maximum current density decr ease with dosage if the samples are irradiated at high temperature. However , after redoping with 1 M HCl, the conductivity of these films can be recov ered, while the maximum current density remains at a lower level. The DSC t hermograms show that the crosslinking density of PANI-HCl film increases du e to the high-energy electron irradiation. (C) 2000 Published by Elsevier S cience S.A. All rights reserved.