High‐frequency measurement of dielectric permittivity and antimicrobial properties of polyaniline and graphite oxide nanocomposites

Abstract

The polyaniline/graphite oxide (PANI/GO) nanocomposite was prepared by the in situ chemical polymerisation method. The synthesis involved the formation of dark green coloured polyaniline/graphite oxide composite. The crystalline structure and morphology of the composite were studied using UV-visible spectroscopy (UV), X-ray diffraction (XRD) and transmission electron microscopy (TEM).The characteristic peaks in XRD and UV-visible spectra confirmed the formation of the PANI/GO nanocomposite. DC conductivity measurements were performed using a two-probe method. Dielectric responses of the composites were investigated in the frequency range100 MHz to 3 GHz by the RF impedance analyser. The dielectric constant ϵ 0 (w) and dielectric loss ϵ 00 (w) were investigated. It was observed that the dielectric constant ϵ 0 (w) and dielectric loss ϵ 00 (w) decreased with an increase in frequencies (for different wt % of GO). The antibacterial activity of this composite was examined.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

Nano‐materials for engineering application

“…Reference [7], 'High frequency measurement of dielectric permittivity and antimicrobial properties of polyaniline and graphite oxide nanocomposites' (by Shubha, L.N. et al), presents advanced technology for measuring dielectric permittivity and antimicrobial properties of selected nanocomposites.…”