Low-frequency and dual-band microwave absorption properties of novel VB-group disulphides(3R–TaS_(2))nanosheets  

作　　者：Liquan Fan Honglin Ai Meiye Jiao Yao Li Yongheng Jin Yiru Fu Jing Wang Yuwei Wang Deqing Zhang Guangping Zheng Junye Cheng 

机构地区：[1]College of Materials Science and Engineering,Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials,Qiqihar University,No.42,Wenhua Street,Qiqihar,161006,PR China [2]Department of Materials Science,Shenzhen MSU-BIT University,Shenzhen,Guangdong Province,517182,PR China [3]Department of Mechanical Engineering,Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China

出　　处：《Nano Materials Science》2024年第5期635-646,共12页纳米材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(52372289,52102368,52072192 and 51977009);Regional Joint Fund for Basic Research and Applied Basic Research of Guangdong Province(No.2020A1515110905);Guangdong Special Fund for key Areas(20237DZX3042);Shenzhen Stable Support Project.

摘　　要：As electromagnetic technology advances and demand for electronic devices grows,concerns about electromagnetic pollution intensify.This has spurred focused research on innovative electromagnetic absorbers,particularly chalcogenides,noted for their superior absorption capabilities.In this study,we successfully synthesize 3R–TaS_(2)nanosheets using a straightforward calcination method for the first time.These nanosheets exhibit significant absorption capabilities in both the C-band(4–8 GHz)and Ku-band(12–18 GHz)frequency ranges.By optimizing the calcination process,the complex permittivity of TaS_(2)is enhanced,specifically for those synthesized at 1000℃for 24 h.The nanosheets possess dual-band absorption properties,with a notable minimum reflection loss(RLmin)of41.4 dB in the C-band,and an average absorption intensity exceeding 10 dB in C-and Ku-bands,in the absorbers with a thickness of 5.6 mm.Additionally,the 3R–TaS_(2)nanosheets are demonstrated to have an effective absorption bandwidth of 5.04 GHz(3.84–8.88 GHz)in the absorbers with thicknesses of 3.5–5.5 mm.The results highlight the multiple reflection effects in 3R–TaS_(2)as caused by their stacked structures,which could be promising low-frequency absorbers.

关 键 词：3R-TaS_(2) NANOSHEETS Electromagnetic wave absorption Reflection loss 

分 类 号：TB383[一般工业技术—材料科学与工程]