Singh P,Singh RA
Polyaniline and its composites with PEG, ZnO have been prepared via biomimetic method. The presence of these polymers (PEG) hinders the growth of large particles due to a diffusion-limited process. The particle size decreases from PAni (60.3 nm)>PAni-PEG (42.7 nm)>PAni- ZnO (34.5 nm)>PAni-PEG-ZnO (16.1 nm). These materials have been characterized by FTIR, UV-visible, XRD, SEM, TGA and AC Impedance spectroscopy techniques. The AC Impedance measured data were simulated using CNLS fitting software in the frequency range of 10-3 Hz to 1011 Hz for best resolution using the parameters of the equivalent circuit. It was found that there was a marked difference in AC impedance spectra, corresponding equivalent circuit elements and relaxation times depending on the particle size of the nanomaterials.