Abstract
Nanocomposite of reduced graphene oxide (rGO) stabilised by biodegradable polymer (chitosan), polyaniline and sol-gel derived calcium copper titanate (CCTO) with chemical composition Ca1-xCexCu3Ti4-yNiyO12 (x=0.0, 0.25, 0.45, and y=0.0, 0.3, 0.5) was synthesized. The role of the chitosan is to ensure that the RGO sheets do not restack into graphite. The characteristics D and G bands of graphene oxide (GO) at 1595 and 1353 cm-1 indicate the formation of GO. Dielectric constant and dielectric loss were calculated from the impedance analyser data. The dielectric properties were explained on the basis of Maxwell-Wagner relaxation model and Koop’s phenomenological theory. The rGO/PANI/CaCu3Ti4O12 nanocomposite shows the highest dielectric constant (7244).
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