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ZnO-decorated SiC@C hybrids with strong electromagnetic absorption

A novel strategy is provided to improve the absorption of SiC nanomaterials through surface carbonization of SiC nanowires and hydrolysis. SiC@C-ZnO composites were synthesized with different dosages of ZnNO(3)·6H(2)O. Composition, microstructure, and electromagnetic properties of the composites wer...

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Autores principales: Duan, Liqun, Yang, Zhiqian, Xia, Yilu, Dai, Xiaoqing, Wu, Jian’an, Sun, Minqian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10167858/
https://www.ncbi.nlm.nih.gov/pubmed/37179593
http://dx.doi.org/10.3762/bjnano.14.47
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author Duan, Liqun
Yang, Zhiqian
Xia, Yilu
Dai, Xiaoqing
Wu, Jian’an
Sun, Minqian
author_facet Duan, Liqun
Yang, Zhiqian
Xia, Yilu
Dai, Xiaoqing
Wu, Jian’an
Sun, Minqian
author_sort Duan, Liqun
collection PubMed
description A novel strategy is provided to improve the absorption of SiC nanomaterials through surface carbonization of SiC nanowires and hydrolysis. SiC@C-ZnO composites were synthesized with different dosages of ZnNO(3)·6H(2)O. Composition, microstructure, and electromagnetic properties of the composites were characterized and analyzed. Results from TEM and XRD show that crystalline ZnO particles adhere to the surface of amorphous carbon, and the ZnO content increases as a function of a dosage of ZnNO(3)·6H(2)O. The as-prepared SiC@C-ZnO hybrids exhibit effective electromagnetic absorption, which is related to a synergy effect of different dielectric loss processes. The minimum reflection loss reached −65.4 dB at 11 GHz at a sample thickness of 3.1 mm, while the effective absorption bandwidth (EAB) reached 7 GHz at a sample thickness of 2.56 mm. Furthermore, the EAB of the samples can also cover the whole X band and Ku band at small sample thicknesses (2.09–3.47 mm). The excellent properties of the materials suggest great prospect as electromagnetic absorbers.
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spelling pubmed-101678582023-05-10 ZnO-decorated SiC@C hybrids with strong electromagnetic absorption Duan, Liqun Yang, Zhiqian Xia, Yilu Dai, Xiaoqing Wu, Jian’an Sun, Minqian Beilstein J Nanotechnol Full Research Paper A novel strategy is provided to improve the absorption of SiC nanomaterials through surface carbonization of SiC nanowires and hydrolysis. SiC@C-ZnO composites were synthesized with different dosages of ZnNO(3)·6H(2)O. Composition, microstructure, and electromagnetic properties of the composites were characterized and analyzed. Results from TEM and XRD show that crystalline ZnO particles adhere to the surface of amorphous carbon, and the ZnO content increases as a function of a dosage of ZnNO(3)·6H(2)O. The as-prepared SiC@C-ZnO hybrids exhibit effective electromagnetic absorption, which is related to a synergy effect of different dielectric loss processes. The minimum reflection loss reached −65.4 dB at 11 GHz at a sample thickness of 3.1 mm, while the effective absorption bandwidth (EAB) reached 7 GHz at a sample thickness of 2.56 mm. Furthermore, the EAB of the samples can also cover the whole X band and Ku band at small sample thicknesses (2.09–3.47 mm). The excellent properties of the materials suggest great prospect as electromagnetic absorbers. Beilstein-Institut 2023-05-04 /pmc/articles/PMC10167858/ /pubmed/37179593 http://dx.doi.org/10.3762/bjnano.14.47 Text en Copyright © 2023, Duan et al. https://creativecommons.org/licenses/by/4.0/This is an open access article licensed under the terms of the Beilstein-Institut Open Access License Agreement (https://www.beilstein-journals.org/bjnano/terms/terms), which is identical to the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0 (https://creativecommons.org/licenses/by/4.0/) ). The reuse of material under this license requires that the author(s), source and license are credited. Third-party material in this article could be subject to other licenses (typically indicated in the credit line), and in this case, users are required to obtain permission from the license holder to reuse the material.
spellingShingle Full Research Paper
Duan, Liqun
Yang, Zhiqian
Xia, Yilu
Dai, Xiaoqing
Wu, Jian’an
Sun, Minqian
ZnO-decorated SiC@C hybrids with strong electromagnetic absorption
title ZnO-decorated SiC@C hybrids with strong electromagnetic absorption
title_full ZnO-decorated SiC@C hybrids with strong electromagnetic absorption
title_fullStr ZnO-decorated SiC@C hybrids with strong electromagnetic absorption
title_full_unstemmed ZnO-decorated SiC@C hybrids with strong electromagnetic absorption
title_short ZnO-decorated SiC@C hybrids with strong electromagnetic absorption
title_sort zno-decorated sic@c hybrids with strong electromagnetic absorption
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10167858/
https://www.ncbi.nlm.nih.gov/pubmed/37179593
http://dx.doi.org/10.3762/bjnano.14.47
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