Electromagnetic(EM)wave absorbers with wideband absorption capability are proposed as a strategy to mitigate environmental pollution by EM waves.However,designing an EM absorber with its performance capacity independent of the EM wave incident angle remains elusive to date.Resolving this challenge requires development of EM absorbers whose EM absorption performance is insensitive to the EM wave incident angle.Herein,we synthesized EM absorbers with a variety of structures with different symme-tries(including micro-/nanospheres,nanoflakes and nanotubes)to study the effect of the EM absorbers'structure and the EM wave incident angle on the EM absorption performance.Our analysis reveals that non-magnetic EM absorbers with spatially symmetric nanostructures exhibit excellent EM wave incident angle-insensitivity.Finally,we demonstrate that a class of non-magnetic EM absorbers made from bam-boo derived-carbon nanospheres exhibit EM incident angle-insensitivity and wideband EM absorption performance with an effective absorption band up to 3.5 GHz when the thickness is 1.4 mm,a signif-icant improvement from prior studies which used thicknesses as high as 3-4 mm for comparable EM absorption performance.

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China;Willian G.Lowrie Department of Chemical and Biomolecular Engineering,The Ohio State University,Columbus,OH,43210,United States of America;School of Materials Science and Engineering Henan University of Science and Technology,Luoyang 471023,China;Institute of Materials Research and Engineering,Agency for Sciences,Technology and Research,Singapore;State Key Laboratory of Medical Molecular Biology,Institute of Basic Medical Sciences Chinese Academy of Medical Sciences,School of Basic Medicine Peking Union Medical College,Beijing 100005,China;Department of Mechanical Engineering,University of Michigan,Ann Arbor,MI,48109,United States of America;Sustainability Institute,The Ohio State University,Columbus,OH,43210,United States of America

[1]Zhichao Lou;Qiuyi Wang;Xiaodi Zhou;Ufuoma I.Kara;Rajdeep S.Mamtani;Hualiang Lv;Meng Zhang;Zhihong Yang;Yanjun Li;Chenxuan Wang;Solomon Adera;Xiaoguang Wang-.An angle-insensitive electromagnetic absorber enabling a wideband absorption)[J].材料科学技术（英文版）,2022(18):33-39

symme,bam,boo

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