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	Constructing of Co nanosheets decorating with WS2 nanoclusters for enhanced electromagnetic wave absorption
	Li, Chaolong; Piao, Mingxing; Zhang, Heng; Wang, Xiao
	2022-08-15
摘要	Artificially designing and preparing composites with unique structure is one of important ways to effectively improve the electromagnetic wave absorption performance. In this study, binary flower-like WS2 /Co hybrid composites through anchoring WS2 nanoclusters on Co nanosheets have been successfully developed. Attributing to the hierarchical structure of the composites, the effective interfacial polarization verifying from distinct Cole-Cole semicircles could improve the dielectric loss substantially, also it enabled the multiple reflections of the incident waves which benefitted for promoting the energy dissipation. Furthermore, the host of lamellate Co could maintain the magnetic characteristic and supply the magnetic loss dominantly caused by natural and exchange resonance deriving from the high planar anisotropy, the guest of WS2 nanoclusters could induce dipole polarization deriving from vacancies of W and S atoms. As a result, excellent wave absorption performance could be achieved for the composites with the minimum RL (RLmin) of - 46.5 dB at 10.2 GHz under a small thickness of 1.7 mm, accompanied by a wide effective bandwidth (RL < -10 dB) covering from 2.7 to 18 GHz with integrated thicknesses from 1.0 to 5.0 mm. Prospectively, this work provides a new opportunity to fabricate the valuable materials for practical electromagnetic wave absorbing applications. (C) 2022 Elsevier B.V. All rights reserved.
关键词	WS2/Co hybrid composites Precursor-directed synthesis Synergetic effect Superior microwave absorption ability
DOI	10.1016/j.jallcom.2022.165269
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	912页码:10
通讯作者	Piao, Mingxing(piaomx@cigit.ac.cn)
收录类别	SCI
WOS记录号	WOS:000797208100001
语种	英语