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Graphene templated growth of copper sulphide 'flowers' can suppress electromagnetic interference

Sharma, D and Menon, AV and Bose, S (2020) Graphene templated growth of copper sulphide 'flowers' can suppress electromagnetic interference. In: Nanoscale Advances, 2 (8). pp. 3292-3303.

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Official URL: https://dx.doi.org/10.1039/d0na00368a

Abstract

With increasing usage of electronic gadgets in various fields, the problem of electromagnetic interference (EMI) has become eminent. To suppress this interference, lightweight materials that are non-corrosive in nature and easy to fabricate, design, integrate and process are in great demand. In the present study, we have grown copper sulphide 'flowers' on graphene oxide by a facile one pot hydrothermal technique. The growth time of the "flower-like"structure was optimised based on structural (XRD) and morphological analysis (SEM). Then, the as-prepared structures were dispersed in a PVDF matrix using melt blending. The bulk AC electrical conductivity and EMI shielding ability of the prepared composite were assessed, and it was observed that the nanocomposites exhibited an EMI shielding effectiveness up to -25 dB manifesting in 86 absorption of the incoming EM waves at a thickness of only 1 mm. Moreover, it was also observed that addition of hybrid nanoparticles has a better effect on the electromagnetic (EM) shielding performance compared to when the nanoparticles are added separately in terms of both total shielding effectiveness as well as absorption performance. A minimum skin depth of 0.38 mm was observed in the case of the hybrid nanostructure. © The Royal Society of Chemistry.

Item Type: Journal Article
Additional Information: The copyright of this article belongs to Royal Society of Chemistry
Keywords: Blending; Copper compounds; Electromagnetic pulse; Electromagnetic wave interference; Graphene; Magnetic shielding; Nanoparticles; Signal interference; Sulfur compounds, Absorption performance; AC electrical conductivity; EMI shielding effectiveness; Hybrid nanostructures; Hydrothermal techniques; Morphological analysis; Shielding effectiveness; Shielding performance, Electromagnetic shielding
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Interdisciplinary Research > Centre for Nano Science and Engineering
Depositing User: Bharath k v
Date Deposited: 24 Sep 2020 10:51
Last Modified: 24 Sep 2020 10:51
URI: http://eprints.iisc.ac.in/id/eprint/66526

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