Space-Charge-Influenced Slow Conductivity Signals of Pyrene Induced by Pulsed Laser Irradiation in Nonpolar Hydrocarbon Solvents

Abstract

The slow conductivity signal is induced by pulsed laser irradiation of pyrene in nonpotar hydrocarbon solvents. Its characteristics under the influence of the space charge effect have been measured in the ms-s region. The time profile of the slow conductivity signal varied dramatically with irradiation position of the laser beam between electrodes; there is a pronounced peak when irradiated at the middle of the two electrodes and there are two peaks (or one peak and one shoulder) when irradiated between the two electrodes. These peaks were assigned to drift of cations and anions, and their mobilities were almost identical.