期刊
NANO RESEARCH
卷 -, 期 -, 页码 -出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-022-5289-z
关键词
SiC nanowires; heterostructure; polarization loss; electromagnetic wave absorption; attenuation mechanism
类别
资金
- National Natural Science Foundation of China
- Major Basic Research Program of Natural Science Foundation of Shandong Province
- Natural Science Foundation of Shandong Province
- Innovation and Technology Program of Shandong Province
- Taishan Scholars Program of Shandong Province
- [52072196]
- [52002199]
- [52002200]
- [52102106]
- [ZR2020ZD09]
- [ZR202108180009]
- [ZR2019BEM042]
- [ZR2020QE063]
- [2020KJA004]
- [ts201511034]
In the past decade, electromagnetic pollution has gained considerable attention. Developing low-cost, lightweight, easy-to-prepare, and highly efficient electromagnetic wave absorbing materials has become a feasible solution. In this study, SiCNWs@MnO2@PPy nanocomposite was successfully prepared and showed excellent electromagnetic wave absorption performances.
In the last decade, electromagnetic pollution has caused people's considerable attention. Developing absorbing material with low cost, lightweight, simple preparation, and high electromagnetic attenuation efficiency has become a feasible means to deal with this problem. In this work, core-shell SiCNWs@MnO2@PPy (NWs: nanowires, PPy: polypyrrole) heterostructures composed of SiC nanowires core, MnO2 nanosheets inter-layer, and PPy coating were successfully prepared through chemical vapor deposition and two-step electrodeposition process. Taking advantage of the interfacial polarization and dipole polarization, the obtained product displays excellent electromagnetic wave absorption performances with the minimum reflection loss (RLmin) of -50.59 dB when the matching thickness is 2.41 mm, and the optimal effective absorption bandwidth (EAB) value reaches to 6.64 GHz at a matching thickness of 2.46 mm, revealing that the SiCNWs@MnO2@PPy nanocomposite could be served as a promising electromagnetic wave absorbing material. On the basis of systematic analysis concerning the electromagnetic parameters, the dissipation process of the incident electromagnetic wave was demonstrated reasonably, which may provide a referable preparation strategy for novel heterostructures, especially nonmagnetic lightweight absorbing material.
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