SiC/rGO Core–Shell Nanowire as a Lightweight, Highly Efficient Gigahertz Electromagnetic Wave Absorber,ACS Applied Electronic Materials

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SiC/rGO Core–Shell Nanowire as a Lightweight, Highly Efficient Gigahertz Electromagnetic Wave Absorber
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-02-03 , DOI: 10.1021/acsaelm.9b00721
Peng Wang ₁ , Zhaochen Li ₁ , Laifei Cheng ₁ , Fang Ye ₁ , Litong Zhang ₁

Affiliation

For the first time, SiC/reduced graphene oxide (rGO) core–shell nanowires used as highly effective, lightweight electromagnetic wave (EMW) absorbers can be successfully prepared by solution electrospinning with a subsequent annealing treatment under a nitrogen atmosphere. The nanowire is composed of cubic SiC nanocrystals with a turbostratic carbon and rGO nanosheet coating on its surface. The EMW absorption performance of the nanowire can be improved efficiently by tuning the GO dispersion volume of the electrospun solution. The nanowire was prepared from the electrospun solution with 1.0 mL of the GO dispersion and showed an optimum reflection loss value of −56.3 dB, and its effective absorption bandwidth can be ≤6.2 GHz covering the whole Ku band (12.2–18.0 GHz). It is found that the specific core–shell structure, defects and functional groups of carbon and rGO, and grain boundaries between the carbon cluster and SiC nanocrystals all play important roles in improving nanowire EMW absorption performance.

中文翻译：

SiC / rGO核-壳纳米线，轻巧高效的千兆赫兹电磁波吸收器

首次通过溶液电纺并随后在氮气氛下进行退火处理，成功制备了用作高效轻质电磁波（EMW）吸收剂的SiC /还原氧化石墨烯（rGO）核壳纳米线。纳米线由立方SiC纳米晶体组成，在其表面具有涡轮层碳和rGO纳米片涂层。通过调节电纺溶液的GO分散体积，可以有效地提高纳米线的EMW吸收性能。纳米线是由具有1.0 mL GO分散液的电纺丝溶液制备的，其最佳反射损耗值为-56.3 dB，其有效吸收带宽在整个Ku波段（12.2-18.0 GHz）范围内可以≤6.2 GHz。发现特定的核壳结构，

更新日期：2020-02-03

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