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Hollow Semiconductor Nanospheres-Anchored Graphene Oxide Sheets for Effective Microwave Absorption

Biswas, Sourav and Dutta, Suvanka and Panja, Sujit S and Bose, Suryasarathi (2017) Hollow Semiconductor Nanospheres-Anchored Graphene Oxide Sheets for Effective Microwave Absorption. In: CHEMISTRYSELECT, 2 (33). pp. 10840-10847.

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Official URL: http://dx.doi.org/10.1002/slct.201702190

Abstract

Considerable attention has been given in recent years towards the development of electromagnetic interference (EMI) shielding materials. In spite of the fact that leading polymer composites containing different magnetic and dielectric nanofillers have been used broadly, nevertheless, the impact of inorganic semiconducting nanomaterials has not been utilized fully. Herein, we have designed hollow ZnS nanospheres doped reduced graphene oxide sheets (rGO) via template-free, one-pot hydrothermal synthesis process and fabricated nanocomposites with poly(vinylidene fluoride), PVDF as matrix. Three dimensional conducting network of rGO sheets along with high interacting surface area with heterogeneous dielectrics led to a very high total shielding effectiveness (-40 dB) with 93% absorption. The underlying mechanism, supported by skin-depth estimation and attenuation constant, is discussed in detail. This study opens new avenues in the field of EMI shielding materials as inorganic semiconductors show promising results in contrast to traditional materials involving conducting, dielectric and magnetic nanoparticles embedded polymer nanocomposites.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: review EPrints Reviewer
Date Deposited: 13 Jan 2018 06:37
Last Modified: 13 Jan 2018 06:37
URI: http://eprints.iisc.ac.in/id/eprint/58596

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