Hollow Gradient-Structured Iron-Anchored Carbon Nanospheres for Enhanced Electromagnetic Wave Absorption.

Content Provider	Europe PMC
Author	Wu, Cao Wang, Jing Zhang, Xiaohang Kang, Lixing Cao, Xun Zhang, Yongyi Niu, Yutao Yu, Yingying Fu, Huili Shen, Zongjie Wu, Kunjie Yong, Zhenzhong Zou, Jingyun Wang, Bin Chen, Zhou Yang, Zhengpeng Li, Qingwen
Abstract	HighlightsMicrowave absorber with nanoscale gradient structure was proposed for enhancing the electromagnetic absorption performance.Outstanding reflection loss value (−62.7 dB), broadband wave absorption (6.4 dB with only 2.1 mm thickness) in combination with flexible adjustment abilities were acquired, which is superior to other relative graded distribution structures.This strategy initiates a new method for designing and controlling wave absorber with excellent impedance matching property in practical applications. AbstractIn the present paper, a microwave absorber with nanoscale gradient structure was proposed for enhancing the electromagnetic absorption performance. The inorganic–organic competitive coating strategy was employed, which can effectively adjust the thermodynamic and kinetic reactions of iron ions during the solvothermal process. As a result, Fe nanoparticles can be gradually decreased from the inner side to the surface across the hollow carbon shell. The results reveal that it offers an outstanding reflection loss value in combination with broadband wave absorption and flexible adjustment ability, which is superior to other relative graded distribution structures and satisfied with the requirements of lightweight equipment. In addition, this work elucidates the intrinsic microwave regulation mechanism of the multiscale hybrid electromagnetic wave absorber. The excellent impedance matching and moderate dielectric parameters are exhibited to be the dominative factors for the promotion of microwave absorption performance of the optimized materials. This strategy to prepare gradient-distributed microwave absorbing materials initiates a new way for designing and fabricating wave absorber with excellent impedance matching property in practical applications.Supplementary InformationThe online version contains supplementary material available at 10.1007/s40820-022-00963-w.
ISSN	23116706
Journal	Nano-Micro Letters
Volume Number	15
PubMed Central reference number	PMC9727008
Issue Number	1
PubMed reference number	36472674
e-ISSN	21505551
DOI	10.1007/s40820-022-00963-w
Language	English
Publisher	Springer Nature Singapore
Publisher Date	2022-12-06
Publisher Place	Singapore
Access Restriction	Open
Rights License	Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. © The Author(s) 2022
Subject Keyword	Gradient structures Carbon nanospheres Electromagnetic wave absorption Impedance matching
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Surfaces, Coatings and Films Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering