Open AccessHigh‐frequency measurement of dielectric permittivity and antimicrobial properties of polyaniline and graphite oxide nanocomposites
Author(s) -
L.N. Shubha,
Putta ChandraBabu
Publication year - 2021
Publication title -
iet nanodielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.23
H-Index - 9
ISSN - 2514-3255
DOI - 10.1049/nde2.12025
Subject(s) - materials science , polyaniline , nanocomposite , dielectric , dielectric spectroscopy , dielectric loss , graphite oxide , high κ dielectric , graphite , composite number , composite material , oxide , in situ polymerization , conductivity , scanning electron microscope , polymerization , analytical chemistry (journal) , polymer , chemistry , electrochemistry , organic chemistry , electrode , optoelectronics , metallurgy
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 ′( w ) and dielectric loss ϵ ′′( w ) were investigated. It was observed that the dielectric constant ϵ ′( w ) and dielectric loss ϵ ′′( w ) decreased with an increase in frequencies (for different wt % of GO). The antibacterial activity of this composite was examined.