Hierarchical Ti_(3)C_(2)T_(x)@ ZnO Hollow Spheres with Excellent Microwave Absorption Inspired by the Visual Phenomenon of Eyeless Urchins  

作　　者：Yan‑Qin Wang Hai‑Bo Zhao Jin‑Bo Cheng Bo‑Wen Liu Qiang Fu Yu‑Zhong Wang 

机构地区：[1]Collaborative Innovation Center for Eco‑Friendly and Fire‑Safety Polymeric Materials(MoE),State Key Laboratory of Polymer Materials Engineering,National Engineering Laboratory for Eco‑Friendly Polymer Materials(Sichuan),College of Chemistry,Sichuan University,Chengdu 610064,People’s Republic of China [2]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,People’s Republic of China

出　　处：《Nano-Micro Letters》2022年第5期62-76,共15页纳微快报（英文版）

基　　金：This work was supported by National Natural Science Foundation of China(Grant Nos.52122302,51991351);Fundamental Research Funds for the Central Universities,Young Elite Scientists Sponsorship Program by CAST;Open access funding provided by Shanghai Jiao Tong University

摘　　要：Ingenious microstructure design and rational composition selection are effective approaches to realize high-performance microwave absorbers,and the advancement of biomimetic manufacturing provides a new strategy.In nature,urchins are the animals without eyes but can“see”,because their special structure composed of regular spines and spherical photosensitive bodies“amplifies”the light-receiving ability.Herein,inspired by the above phenomenon,the biomimetic urchin-like Ti_(3)C_(2)T_(x)@ZnO hollow microspheres are rationally designed and fabricated,in which ZnO nanoarrays(length:~2.3μm,diameter:~100 nm)as the urchin spines are evenly grafted onto the surface of the Ti_(3)C_(2)T_(x) hollow spheres(diameter:~4.2μm)as the urchin spherical photosensitive bodies.The construction of gradient impedance and hierarchical heterostructures enhance the attenuation of incident electromagnetic waves.And the EMW loss behavior is further revealed by limited integral simulation calculations,which fully highlights the advantages of the urchin-like architecture.As a result,the Ti_(3)C_(2)T_(x)@ZnO hollow spheres deliver a strong reflection loss of−57.4 dB and broad effective absorption bandwidth of 6.56 GHz,superior to similar absorbents.This work provides a new biomimetic strategy for the design and manufacturing of advanced microwave absorbers.

关 键 词：Bioinspired Hierarchical heterostructures Ti_(3)C_(2)T_(x)MXene ZnO nanoarrays Microwave absorption 

分 类 号：TB34[一般工业技术—材料科学与工程] TN015[电子电信—物理电子学] O441[理学—电磁学]