Selective assembly of magnetic nano-antenna for electromagnetic dissipation

被引：15

作者：

Fang, Jiefeng ^{[1
]}

Lv, Hualiang ^{[1
]}

Zhao, Biao ^{[1
]}

Liu, Zhengwang ^{[1
]}

Li, Xiaohui ^{[1
]}

Xu, Chunyang ^{[1
]}

Zhang, Ruixuan ^{[1
]}

Zhang, Huibin ^{[1
]}

Liu, Xianhu ^{[2
]}

Zhang, Xuefeng ^{[3
]}

Wang, Min ^{[1
]}

Che, Renchao ^{[1
,4
]}

机构：

[1] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Dept Mat Sci, Lab Adv Mat, Shanghai 200438, Peoples R China

[2] Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China

[3] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Inst Adv Magnet Mat, Hangzhou 310012, Peoples R China

[4] Zhejiang Lab, Joint Res Ctr Computat Mat, Hangzhou 311100, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2022年 / 10卷 / 20期

基金：

中国国家自然科学基金;

关键词：

ENHANCED MICROWAVE-ABSORPTION; FACILE SYNTHESIS; AT-C; COMPOSITES; NANOPARTICLES; NANOFIBERS;

D O I：

10.1039/d2ta02186b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Assembly of multiple-component composites into a beneficial multi-shell structure has been demonstrated as an efficient strategy to induce wideband electromagnetic (EM) attenuation in principle. However, structural engineering with selective components remains challenging, hindering the development of high-performance EM absorbers. Herein, a distinctive structure of large-scale magnetic particle-decorated multi-branch Fe@SiO2@Fe is proposed, obtained via an anisotropic magnetic loading strategy to achieve broadband microwave attenuation performance. Adjusting the interaction force equilibrium between magnetic particles and silica, a uniform coating layer composed of bulky magnetic particles on a 3D template is fabricated. The effective microwave bandwidth is broadened by the enhanced magnetic response range with multi-scale magnetic couplings and remarkable hierarchical interfacial polarization in our highly symmetrical structure, reaching 11.5 GHz at a thickness of 2.5 mm. Our component and structural modulation provides a strategy for achieving ultra-broadband EM absorption by anisotropic design.

引用

页码：10909 / 10915

页数：7

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