Co/Co₃O₄ Based Nanoparticles and Their Polymer Composites for Tuned Electromagnetic Interference Shielding Application

Madhvi Tiwari; M A Arya; Priyesh V More; Saurabh Parmar; Suwarna Datar; Pawan K Khanna

doi:10.1166/jnn.2020.17474

Co/Co₃O₄ Based Nanoparticles and Their Polymer Composites for Tuned Electromagnetic Interference Shielding Application

J Nanosci Nanotechnol. 2020 May 1;20(5):2847-2857. doi: 10.1166/jnn.2020.17474.

Authors

Madhvi Tiwari¹, M A Arya¹, Priyesh V More¹, Saurabh Parmar², Suwarna Datar², Pawan K Khanna¹

Affiliations

¹ Nanomaterials/QDs Laboratory, Department of Applied Chemistry, Defence Institute of Advanced Technology, Defence Research and Development Organisation, Pune 25, India.
² Department of Applied Physics, Defence Institute of Advanced Technology, Pune 25, India.

PMID: 31635621
DOI: 10.1166/jnn.2020.17474

Abstract

The magnetic properties of the metal nanoparticles (NPs) can play remarkable role in electromagnetic interference shielding (EMI Shielding) of many defence and commercial electronic devices. In the present work, coconut oil and PVA capped magnetic cobalt/cobalt oxide nanoparticles (Co/Co₃O₄ NPs) were synthesized by chemical reduction method and impregnated in polymer matrix to verify their EMI shielding behaviour. The coconut oil capped Co/Co₃O₄ NPs with presence of hcp and fcc phases were prepared in the size domain of 7-10 nm and the effect of surfactant (the oil) on size and oxidation state was studied by varying the ratios. The shielding efficiencies of Co/Co₃O₄ NPs PVA nanocomposites were analysed by using vector network analyser (VNA) in X- and K_u-band ranging from 8 GHz-18 GHz. The VNA results showed increased shielding efficiency with increasing concentration of NPs.