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Electronic properties of polypyrrole based TiO 2 nanofiber composite
Author(s) -
Tiwari Dinesh Chandra,
Atri Priyanka,
Sharma Rishi
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40036
Subject(s) - polypyrrole , materials science , polymerization , scanning electron microscope , dielectric spectroscopy , nanocomposite , composite number , titanium dioxide , nanofiber , dielectric , conductive polymer , chemical engineering , composite material , polymer chemistry , polymer , chemistry , electrochemistry , electrode , optoelectronics , engineering
In this work, Polypyrrole (PPy), Titanium dioxide nanofiber (TiO 2 ‐nf) are prepared by oxidative polymerization and hydrothermal process respectively. The PPy/TiO 2 ‐nf composite is prepared by in situ oxidative polymerization in the presence of pyrrole monomer and TiO 2 ‐nf. The nanocomposite and TiO 2 ‐nf are then characterized by scanning electron microscopy (SEM) and energy dispersive X‐ray spectroscopy (EDX) techniques and XRD studies. Dielectric studies of PPy/TiO 2 ‐nf composite is carried out in the frequency range of 1 KHz‐3 MHz at varying temperature and it shows anomalous behavior at 1MHz, where its value reaches to its minimum value of 13 at room temperature and this dip remains even at higher temperature. Impedance study is used to understand the grain and grain boundary effects of the material; frequency dependent ac conductivity has two regions separated at 1MHz, which is being explained by hopping conduction and Maxwell‐Wagner type mechanism, respectively. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014 , 131 , 40036.