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

作　　者：Cao Wu Jing Wang Xiaohang Zhang Lixing Kang Xun Cao Yongyi Zhang Yutao Niu Yingying Yu Huili Fu Zongjie Shen Kunjie Wu Zhenzhong Yong Jingyun Zou Bin Wang Zhou Chen Zhengpeng Yang Qingwen Li 

机构地区：[1]Key Laboratory of Multifunctional Nanomaterials and Smart Systems,Advanced Materials Division,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,Jiangsu,People’s Republic of China [2]School of Science,Nanchang Institute of Technology,Nanchang 330099,Jiangxi,People’s Republic of China [3]Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials,Jiangxi Institute of Nanotechnology,Nanchang 330200,Jiangxi,People’s Republic of China [4]School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei 230026,Anhui,People’s Republic of China [5]School of Materials Science and Engineering,Nanyang Technological University,50 Nanyang Avenue,Singapore 639798,Singapore [6]Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application,School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,People’s Republic of China [7]School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211800,People’s Republic of China [8]Henan Key Laboratory of Materials On Deep-Earth Engineering,School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,People’s Republic of China [9]College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,People’s Republic of China

出　　处：《Nano-Micro Letters》2023年第1期144-160,共17页纳微快报（英文版）

基　　金：the National Natural Science Foundation of China(52102372,52162007,52163032);China Postdoctoral Science Foundation(2022M712321);the Jiangsu Province Postdoctoral Research Funding Program(2021K473C).

摘　　要：In 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.

关 键 词：Gradient structures Carbon nanospheres Electromagnetic wave absorption Impedance matching 

分 类 号：TB33[一般工业技术—材料科学与工程]