Materials Chemistry and Physics, Vol.140, No.2-3, 472-477, 2013
Low frequency alternating current conduction and dielectric relaxation in polypyrrole irradiated with 100 MeV swift heavy ions of silver (Ag8+)
Polypyrrole (PPY) films were prepared by electrochemical polymerization technique. The fully undoped samples were irradiated with different radiation fluences ranging from 10(10) to 10(12) ions cm(-2) of 100 MeV silver (Ag8+) ions. The temperature dependence of ac conductivity [sigma(m)(omega))], dielectric constant (epsilon') and dielectric loss (epsilon '') of both irradiated as well as unirradiated samples have been investigated in 77-300 K. There exists typical Debye type dispersion. Giant increase in dielectric constant has been observed for irradiated samples which is attributed to polaronic defects produced during irradiation. (C) 2013 Elsevier B.V. All rights reserved.