Controllable Fabricating Dielectric-Dielectric SiC@C Core-Shell Nanowires for High-Performance Electromagnetic Wave Attenuation

ACS Applied Materials & Interfaces
Caiyun Liang, Zhijiang Wang

Abstract

Heterostructured dielectric-dielectric nanowires of SiC core and carbon shell (SiC@C) with high-performance electromagnetic wave absorption were synthesized by combining an interfacial in situ polymer encapsulation and carbonization process. This approach overcomes the shortcomings of previous reported methods to prepare carbon shell that both carbon shell and free carbon particles are formed simultaneously. In our developed approach, the core of SiC nanowires are first positively charged. Then the negative resorcinol-formaldehyde polymers as the carbon source are anchored on SiC nanowires under the attraction of electrostatic force, which well suppresses the nucleation of free carbon particles. The thickness of the carbon shell could be modulated from 4 to 20 nm by simply adjusting the moral ratio of resorcinol to SiC nanowires. The resulting SiC@C core-shell nanostructures without free carbon particles offer synergism among the SiC nanowires and the carbon shells, generating multiple dipolar polarization, surfaced polarization, and associated relaxations, which endow SiC@C hybrid nanowires with a minimum reflection loss (RL) value of -50 dB at the frequency of 12 GHz and an effective absorption bandwidth of 8 GHz with RL valu...Continue Reading

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Citations

Oct 5, 2018·Physical Chemistry Chemical Physics : PCCP·Bozhen SongRui Zhang
Mar 19, 2020·Nanotechnology·Junying ZhangXin-Yu Chen
Jan 30, 2020·Advanced Science·Wei-Li SongDaining Fang
Oct 5, 2020·Advances in Colloid and Interface Science·Fail SultanovOlzhas Daulbayev
Jul 6, 2019·ACS Applied Materials & Interfaces·De-Qing ZhangMao-Sheng Cao
Feb 25, 2020·ACS Applied Materials & Interfaces·Xiaoyan YuanLaifei Cheng
Apr 14, 2020·ACS Applied Materials & Interfaces·Jiaming XuGang Wang
Nov 6, 2018·ACS Applied Materials & Interfaces·Kai-Lun ZhangDaining Fang

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