THERMOPOWER AND HIGH-PRESSURE ELECTRICAL-CONDUCTIVITY MEASUREMENTS OFTEMPLATE SYNTHESIZED POLYPYRROLE

We present results of high-pressure-low-temeprature studies of templat e synthesized polypyrrole. Thermopower measurements at ambient pressur e show a linear temperature dependence, which supports the intrinsic m etallic character of the samples. The dc conductivity follows the typi cal variable-range-hopping behavior at low temperatures. The applicati on of pressure results in an increasing localization length and an enh ancement of the conductivity, especially at very low temperatures. The comparison with bulk samples of polypyrrole suggests that the templat e synthesis increases the localization length of the charge carriers, which in turn results in an increase of the dc electrical conductivity .