Conductivity properties of hollow ZnFe2O4 nanofibers doped polyaniline nanocomposites

Zinc ferrite nanofibers doped polyaniline (PANI) nanocomposites have been prepared by oxidation polymerization technique in various weight percentages. The prepared nanocomposites were characterized by Fourier transmission infrared spectroscopy, X-ray's diffraction for structural studies, scanning electron microscopy and transmission electron microscopy for surface morphology. Further the composites are used for dielectric studies by two probe method using Keithley source meter. Among all nanocomposites, 15 wt% of PANI-ZnFe2O4 nanocomposite shows high conductivity 1.23 S/cm and lowest relaxation time of 0.021 A mu s in comparison to other compositions. The dielectric constant decreases as a function of applied frequency due to the multiple polarizations which occurs in polymer nanocomposite. The tangent loss decreases with increase in 15 wt% of filler up to 10(4) Hz after that it remains constant. Therefore these composites are suitable for electronic applications such as lossless materials, capacitor, sensors etc.