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Issue 12, 2015
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Covalent interaction enhanced electromagnetic wave absorption in SiC/Co hybrid nanowires

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Abstract

The interaction between components in hybrids is an indispensable factor in designing and fabricating composites with distinguished electromagnetic (EM) absorption performances. Herein, covalently bonded SiC/Co hybrid nanowires (NWs) have been fabricated, which present significantly enhanced EM absorption compared to a simple physical mixture of SiC and Co. The hybrids are characterized by transmission electron microscopy, X-ray diffraction, Raman spectroscopy, vector network analysis, and X-ray absorption near-edge spectroscopy at the Si K-edge, C K-edge, Co L3,2-edge and O K-edge. Microstructure analysis indicates the formation of Si–O–Co bonds between SiC NWs and magnetic Co nanocrystals. Charge transfer takes place in the covalently bonded SiC/Co hybrid NWs. The induced synergistic coupling interaction in SiC/Co leads to an effective EM absorption band (RL < −10 dB) covering the frequency range of 10–16.6 GHz when the Co content is 25.1 wt% in the hybrid.

Graphical abstract: Covalent interaction enhanced electromagnetic wave absorption in SiC/Co hybrid nanowires

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Publication details

The article was received on 14 Jan 2015, accepted on 23 Feb 2015 and first published on 23 Feb 2015


Article type: Paper
DOI: 10.1039/C5TA00303B
Citation: J. Mater. Chem. A, 2015,3, 6517-6525

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    Covalent interaction enhanced electromagnetic wave absorption in SiC/Co hybrid nanowires

    H. Wang, L. Wu, J. Jiao, J. Zhou, Y. Xu, H. Zhang, Z. Jiang, B. Shen and Z. Wang, J. Mater. Chem. A, 2015, 3, 6517
    DOI: 10.1039/C5TA00303B

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