Wool-Ball-Type Core-Dual-Shell FeCo@SiO2@MWCNTs Microcubes for Screening Electromagnetic Interference

Arief, I and Biswas, S and Bose, S (2018) Wool-Ball-Type Core-Dual-Shell FeCo@SiO2@MWCNTs Microcubes for Screening Electromagnetic Interference. In: ACS Applied Nano Materials, 1 (5). pp. 2261-2271.

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Abstract

Engineered nanostructure-reinforced lightweight polymer composites with superior electromagnetic (EM) shielding effectiveness (SET) are widely employed in high-end applications such as aerospace and microelectronic devices. Recently, carbon nanotube-based three-dimensional nanostructures have shown enormous potential due to unmatched processability, mechanical, and electronic properties. In this study, we present for the first time, highly permeable FeCo-based core-double shell wool-ball-type microcubes chemically enclosed by dielectric silica and conducting multiwalled carbon nanotubes (MWCNTs) sequentially; the resulting reinforced nanocomposites with low filler loading produced superior SET of-35 dB at 18 GHz for a specimen of 3 mm thickness. The excellent dispersion of microstructures in the soft matrix owing to the encapsulation of hard FeCo magnets by MWCNTs ensures low density and excellent flexibility for high-precision applications. The nanoengineered core-dual shell strategy for fabricating magnetic-dielectric-conducting microcubes ensures strong magnetic loss, coupled with dielectric and conduction loss, respectively, from SiO2 and MWCNT shells. This approach, being unique in terms of nanofabrication and subsequent formulation of lightweight flexible composites, demonstrates a highly efficient way toward designing advanced nanocomposites for cutting-edge shielding application.

Item Type:	Journal Article
Publication:	ACS Applied Nano Materials
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society.
Keywords:	Carbon nanotubes; Cobalt alloys; Electromagnetic pulse; Electromagnetic shielding; Electromagnetic wave interference; Electronic properties; Iron alloys; Low-k dielectric; Magnetic leakage; Microelectronics; Nanocomposites; Nanotubes; Reinforced plastics; Reinforcement; Shells (structures); Shielding; Signal interference; Silica; Wool; Yarn, core-dual shell; Electromagnetic interference shielding; feco microcubes; Micro-electronic devices; Multiwalled carbon nanotube (MWCNTs); Reinforced nanocomposite; Shielding effectiveness; Three-dimensional nanostructures, Multiwalled carbon nanotubes (MWCN)
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	11 Aug 2022 10:14
Last Modified:	11 Aug 2022 10:14
URI:	https://eprints.iisc.ac.in/id/eprint/75544

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