Tuning Dielectric Loss of SiO<sub>2</sub>@CNTs for Electromagnetic Wave Absorption

Fenghui Cao; Jia Xu; Xinci Zhang; Bei Li; Xiao Zhang; Qiuyun Ouyang; Xitian Zhang; Yujin Chen

doi:10.3390/nano11102636

Nanomaterials (Oct 2021)

Tuning Dielectric Loss of SiO<sub>2</sub>@CNTs for Electromagnetic Wave Absorption

Fenghui Cao,
Jia Xu,
Xinci Zhang,
Bei Li,
Xiao Zhang,
Qiuyun Ouyang,
Xitian Zhang,
Yujin Chen

Affiliations

Fenghui Cao: Key Laboratory of In-Fiber Integrated Optics, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
Jia Xu: Key Laboratory of In-Fiber Integrated Optics, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
Xinci Zhang: Key Laboratory of In-Fiber Integrated Optics, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
Bei Li: Key Laboratory of In-Fiber Integrated Optics, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
Xiao Zhang: Key Laboratory of In-Fiber Integrated Optics, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
Qiuyun Ouyang: Key Laboratory of In-Fiber Integrated Optics, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
Xitian Zhang: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
Yujin Chen: Key Laboratory of In-Fiber Integrated Optics, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China

DOI: https://doi.org/10.3390/nano11102636
Journal volume & issue: Vol. 11, no. 10
p. 2636

Abstract

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We developed a simple method to fabricate SiO2-sphere-supported N-doped CNTs (NCNTs) for electromagnetic wave (EMW) absorption. EMW absorption was tuned by adsorption of the organic agent on the precursor of the catalysts. The experimental results show that the conductivity loss and polarization loss of the sample are improved. Meanwhile, the impedance matching characteristics can also be adjusted. When the matching thickness was only 1.5 mm, the optimal 3D structure shows excellent EMW absorption performance, which is better than most magnetic carbon matrix composites. Our current approach opens up an effective way to develop low-cost, high-performance EMW absorbers.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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