期刊
SMALL
卷 18, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202107265
关键词
arc-discharged plasma approach; electromagnetic wave absorption; high-entropy-alloy@graphite nanoparticles; interfacial impedance matching; interfacial polarization
类别
资金
- National Key Research and Development Program of China [2019YFE0121700]
- Fundamental Research Funds for the Central Universities [N2102010]
- National Natural Science Foundation of China [U1908220]
- Natural Science Foundation of Zhejiang Province of China [2019C01121]
Designing heterogeneous interfaces and components at the nanoscale has been proven effective for optimizing electromagnetic wave absorption and shielding properties. The proposed arc-discharged plasma method can synthesize core@shell structural high-entropy-alloy@graphite nanocapsules, achieving desirable dielectric polarization and ferromagnetic resonances. The approach can be extended to other carbon-coated complex components systems for various applications.
Designing heterogeneous interfaces and components at the nanoscale is proven effective for optimizing electromagnetic wave absorption and shielding properties, which can achieve desirable dielectric polarization and ferromagnetic resonances. However, it remains a challenge for the precise control of components and microstructures via an efficient synthesis approach. Here, the arc-discharged plasma method is proposed to synthesize core@shell structural high-entropy-alloy@graphite nanocapsules (HEA@C-NPs), in which the HEA nanoparticles are in situ encapsulated within a few layers of graphite through the decomposition of methane. In particular, the HEA cores can be designed via combinations of various transition elements, presenting the optimized interfacial impedance matching. As an example, the FeCoNiTiMn HEA@C-NPs obtain the minimum reflection loss (RLmin) of -33.4 dB at 7.0 GHz (3.34 mm) and the efficient absorption bandwidth (<=-10 dB) of 5.45 GHz ranging from 12.55 to 18.00 GHz with an absorber thickness of 1.9 mm. The present approach can be extended to other carbon-coated complex components systems for various applications.
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