DataVXAdvanced MaterialsPaper
journal article·2024-06

The Electron Migration Polarization Boosting Electromagnetic Wave Absorption Based on Ce Atoms Modulated yolk@shell FexN@NGC

Zhenhui Ma, Ke Yang, Da Li, Hu Liu, Shengchong Hui, Yuying Jiang, Siyuan Li, Yiming Li, Wang Yang, Hongjing Wu, Yanglong Hou

Advanced Materials· Volume 36· Issue 23
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Source abstract

Abstract

Abstract The electron migration polarization is considered as a promising approach to optimize electromagnetic waves (EMW) dissipation. However, it is still difficult to realize well‐controlled electron migration and elucidate the related EMW loss mechanisms for current researches. Herein, a novel FexN@NGC/Ce system to construct an effective electron migration model based on the electron leaps among the 4f/5d/6s orbitals of Ce ions is explored. In Fe4N@NGC/CeSA+Cs+NPs, Ce single‐atoms (SA) mainly represent a +3 valence state, which can feed the electrons to Ce4+ of clusters (Cs) and CeO2 nanoparticles (NPs) through a conductive network under EMW, leading to the electron migration polarization. Such electron migration loss combined with excellent magnetic loss provided by Fe4N core, results in the optimal EMW attenuation performance with a minimum reflection loss exceeds −85.1 dB and a broadened absorption bandwidth up to 7.5 GHz at 1.5 mm. This study clarifies the in‐depth relationship between electron migration polarization and EMW dissipation, providing profound insights into developing well‐coordinated magnetic–dielectric nanocomposites for EMW absorption engineering.
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Research context

Nanomaterials

OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Microwave Dielectric Ceramics Synthesis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics Beijing Technology and Business University Beijing 100048 China

School of Science and Engineering The Chinese University of Hong Kong Shenzhen 518172 China

School of Chemistry and Chemical Engineering Xi'an University of Architecture and Technology Xi'an 710055 China

MOE Key Laboratory of Material Physics and Chemistry under Extraordinary School of Physical Science and Technology Northwestern Polytechnical University Xi'an 710072 China

State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

Beijing Key Laboratory for Magnetoelectric Materials and Devices School of Materials Science and Engineering Peking University Beijing 100871 China

School of Materials Shenzhen Campus of Sun Yat‐Sen University Shenzhen 518107 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China

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