INVESTIGATION OF AGING EFFECTS IN PANI-CSA BY CONDUCTIVITY AND STRUCTURAL MEASUREMENTS

Thermal ageing effect on the highly conducting CSA-PANI. was investiga ted by measurements of the thermal dependence of the conductivity and by X-ray studies of the structure. The non-aged sample shows a metalli c-like conductivity around room temperature (RT) and activated behavio r dominates the low temperatures. With ageing, the metallic character at RT vanishes, whereas 16% of the sample is still crystalline after 2 0 days of ageing. A preliminary analysis of the data is carried out us ing a simple combination of a metallic and a hopping term in series.