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Core-Multishell Heterostructure with Excellent Heat Dissipation for Electromagnetic Interference Shielding

Bhattacharjee, Y and Chatterjee, D and Bose, S (2018) Core-Multishell Heterostructure with Excellent Heat Dissipation for Electromagnetic Interference Shielding. In: ACS Applied Materials and Interfaces, 10 (36). pp. 30762-30773.

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Official URL: https://doi.org/10.1021/acsami.8b10819


Herein, we report high electromagnetic interference (EMI) shielding effectiveness of -40 dB in the Ku-band (for a 600 μm thick film) through a unique core-shell heterostructure consisting of a ferritic core (Fe3O4) and a conducting shell (multiwalled carbon nanotubes, MWCNTs) supported onto a dielectric spacer (here SiO2). In recent times, materials with good flexibility, heat dissipation ability, and sustainability together with efficient EMI shielding at minimal thickness are highly desirable, especially if they can be easily processed into thin films. The resulting composites here shielded EM radiation mostly through absorption driven by multiple interfaces provided by the heterostructure. The shielding value obtained here is fairly superior among the different polymer nanocomposite-based EMI shielding materials. In addition to EMI shielding capability, this composite material exhibits outstanding heat dissipation ability (72 °C to room temperature in less than 90 s) as well as high heat sustainability. The composite material retained its EMI shielding property even after repeated heat cycles, thereby opening new avenues in the design of lightweight, flexible, and sustainable EMI shielding materials.

Item Type: Journal Article
Publication: ACS Applied Materials and Interfaces
Publisher: American Chemical Society
Additional Information: The copyright for this article belongs to the American Chemical Society.
Keywords: Composite materials; Electromagnetic pulse; Electromagnetic wave interference; Heat losses; Iron oxides; Magnetite; Multiwalled carbon nanotubes (MWCN); Nanocomposites; Shielding; Signal interference; Silica; Sustainable development; Thick films; Yarn, Dielectric spacers; Electromagnetic interference shielding; EMI shielding; Emi shielding properties; Minimal thickness; Multiple interfaces; Polymer nanocomposite; Shielding effectiveness, Electromagnetic shielding
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 05 Aug 2022 10:37
Last Modified: 05 Aug 2022 10:37
URI: https://eprints.iisc.ac.in/id/eprint/75378

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