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Graphene nanoflakes with optimized nitrogen doping fabricated by are discharge as highly efficient absorbers toward microwave absorption
Zhou, Yuanliang; Wang, Ning; Muhammad, Javid; Wang, Dongxing; Duan, Yuping; Zhang, Xuefeng; Dong, Xinglong; Zhang, Zhidong
2019-07-01
Source PublicationCARBON
ISSN0008-6223
Volume148Pages:204-213
AbstractAbundant resources, light weight as well as stable physicochemical properties enable carbon nano-materials promising candidates toward microwave absorption. However, it is still a great challenge for carbon-based absorbers to achieve broad frequency bandwidth and strong absorption, which fundamentally ascribes to the poor impedance matching resulted by their comparatively high electrical conductivities. Herein, a feasible and high-yield method has been employed to the in-situ synthesis of N-doped graphene nanoflakes which can effectively address interfacial impedance mismatching, and realize the majority of microwaves penetration into the interior of absorber. The incorporation of substitutional N atoms into graphene lattices markedly weaken crystallization degree and introduce masses of defects, directly leading to the decline of electric conductivity, meanwhile benefiting the improvement of static magnetization. Our findings indicate that compared with pure graphene nanoflakes, the counterpart containing 4.6 at.% of nitrogen exhibits an excellent absorption capability, in which more than 99% of microwave energy can be quantitatively attenuated at 5-18 GHz. Experimental results coupled with theory calculations further elucidate that such high performance essentially originates from the proper impedance matching constructed in the N-doped graphene nanoflakes. (C) 2019 Elsevier Ltd. All rights reserved.
Indexed BySCI
Language英语
WOS IDWOS:000468421900022
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80958
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhou, Yuanliang,Wang, Ning,Muhammad, Javid,et al. Graphene nanoflakes with optimized nitrogen doping fabricated by are discharge as highly efficient absorbers toward microwave absorption[J]. CARBON,2019,148:204-213.
APA Zhou, Yuanliang.,Wang, Ning.,Muhammad, Javid.,Wang, Dongxing.,Duan, Yuping.,...&Zhang, Zhidong.(2019).Graphene nanoflakes with optimized nitrogen doping fabricated by are discharge as highly efficient absorbers toward microwave absorption.CARBON,148,204-213.
MLA Zhou, Yuanliang,et al."Graphene nanoflakes with optimized nitrogen doping fabricated by are discharge as highly efficient absorbers toward microwave absorption".CARBON 148(2019):204-213.
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