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Wu et al. Soft Sci 2024;4:42 Soft Science
DOI: 10.20517/ss.2024.51

Research Article Open Access

Dual magnetic particles modified carbon nanosheets

in CoFe/Co@NC heterostructure for efficient
electromagnetic synergy

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Zhanming Wu , Jun Huang , Xiaojun Zeng *
Jiangxi Key Laboratory of Advanced Ceramic Materials, School of Materials Science and Engineering, Jingdezhen Ceramic
University, Jingdezhen 333403, Jiangxi, China.
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Authors contributed equally.
* Correspondence to: Prof. Xiaojun Zeng, Jiangxi Key Laboratory of Advanced Ceramic Materials, School of Materials Science and
Engineering, Jingdezhen Ceramic University, Rixin Road, Fuliang County, Jingdezhen 333403, Jiangxi, China. E-mail:
zengxiaojun@jcu.edu.cn
How to cite this article: Wu Z, Huang J, Zeng X. Dual magnetic particles modified carbon nanosheets in CoFe/Co@NC
heterostructure for efficient electromagnetic synergy. Soft Sci 2024;4:42. https://dx.doi.org/10.20517/ss.2024.51
Received: 9 Oct 2024 First Decision: 9 Nov 2024 Revised: 21 Nov 2024 Accepted: 28 Nov 2024 Published: 30 Nov 2024

Academic Editor: Zhigang Chen Copy Editor: Pei-Yun Wang Production Editor: Pei-Yun Wang

Abstract
Dual magnetic particles-modified carbon materials have great potential in terms of ultrathin thickness (≤ 2 mm)
and super electromagnetic wave (EMW) absorption (≤ -70 dB). Herein, using CoFe-metal-organic framework
(MOF)-derived CoFe/Co@NC heterostructures composed of hollow CoFe nanospheres, solid Co nanospheres, and
nitrogen-doped carbon (NC) nanosheets, we demonstrate how the dual magnetic particles regulate the
electromagnetic response behavior of the heterostructure and thus steer the efficient EMW absorption
performance. That is, CoFe/Co@NC heterostructure inherits an ultra-strong reflection loss (R ) of -73.8 dB at
L
1.78 mm. The effective absorption bandwidth (EAB) value is also available up to 5.4 GHz. Moreover, computer
simulation technology (CST) simulations reveal the good radar stealth effect of heterostructures. Experimentally,
the outstanding EMW absorption of CoFe/Co@NC heterostructure is due to a large number of heterointerfaces,
good conductive networks and dual magnetic nanoparticles, which bring considerable interface polarization,
conduction loss, and magnetic loss characteristics. These findings underscore the importance of electromagnetic
synergy induced by dual magnetic particles for steering the electromagnetic response of EMW absorbers.

Keywords: Dual magnetic particles, CoFe/Co@NC heterostructure, electromagnetic synergy, ultrathin thickness,
electromagnetic wave absorption

© The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0
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