Table of Contents
Journal of Polymers
Volume 2014, Article ID 950304, 5 pages
http://dx.doi.org/10.1155/2014/950304
Research Article

Dielectric Spectroscopy of Nanostructured Polypyrrole-NiO Composites

Department of PG Studies and Research in Materials Science, Gulbarga University, Gulbarga 585106, India

Received 12 January 2014; Revised 3 April 2014; Accepted 7 April 2014; Published 4 May 2014

Academic Editor: Abdülkadir Sezai Sarac

Copyright © 2014 Syeda Seema and M. V. N. Ambika Prasad. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Conducting polypyrrole-nickel oxide (polypyrrole-NiO) composites were synthesized by in situ deposition technique by placing different weight percentages of NiO powder (10, 20, 30, 40, and 50%) during the polymerisation of pyrrole. The polypyrrole-NiO composites were later characterised with Fourier transform infrared spectroscopy (FTIR) which confirms the presence of polypyrrole in the composite. AC conductivity was studied in the frequency range from 102 to 107 Hz. From these studies it is found that AC conductivity remains constant at low frequency and increases rapidly at higher frequency, which is the characteristic behavior of disordered materials. The dielectric behavior of these composites was also investigated in the frequency range 102–107 Hz. It is observed from these studies that the dielectric constant and dielectric tangent loss decrease exponentially with frequency. The composites exhibit a low value of dielectric loss at higher frequency.