Abstract

Polypyrrole (PPy) nanoparticles have been synthesized at three different temperatures of 277K, 298K and 323K by oxidation process using Ammonium Peroxidisulphate as an oxidizing agent. Samples were subjected to X-ray diffraction studies and from that it has been confirmed that they are noncrystalline in nature. SEM images showed an agglomeration of the nanoparticles with nearly spherical in shape. Optical absorption (UV-vis) spectra have shown transitions from valence band to polarons and bipolarons of the oxidized form of polypyrrole nanoparticles. Temperature dependence of DC conductivity has been measured and data analyzed using Mott’s Small polaron hopping and Variable range hopping models. Activation energies for DC conduction and density of states at Fermi level have been determined

Paper Details