TY - JOUR
T1 - Abundant vacancies induced high polarization-attenuation effects in flower-like WS2 microwave absorbers
AU - Wang, Jing
AU - Wang, Yuping
AU - Cheng, Junye
AU - Fu, Yiru
AU - Li, Yao
AU - Nie, Wangli
AU - Wang, Jingwei
AU - Liu, Bin
AU - Zhang, Deqing
AU - Zheng, Guangping
AU - Cao, Maosheng
N1 - Publisher Copyright:
© 2024
PY - 2024/9/20
Y1 - 2024/9/20
N2 - Defect engineering could provide new ideas for the design of transition metal disulfide electromagnetic wave (EMW) absorbers with high performance. Since the effects of dipoles on impedance matching and EMW absorption are crucial for the development of novel absorbers, the polarization attenuation dependence on defect engineering should be understood at micro- and macro-scales. In this paper, it is found that the defect-rich WS2 nanoflowers synthesized by the cold plasma method possess excellent EMW absorption properties. Cold plasma treatment of materials is easy to perform and maintains the original shape of the material to a high degree. The formation of defects results in abundant electrochemically active sites, increased multiple reflection losses, improved dielectric properties and impedance matching in the materials. The RLmin of the defect-rich material with a thickness of 3.19 mm is as high as −54.36 dB at 8.16 GHz, and the effective absorption bandwidth is 4.72 GHz. The results reveal that the formation of defective vacancies enhances the effects of dipole polarization of the material on improving its EMW absorption properties. Thus, this work provides not only a facile preparation route for novel EMW-absorbing materials, but also a new strategy for tunning defects in transition metal disulfides.
AB - Defect engineering could provide new ideas for the design of transition metal disulfide electromagnetic wave (EMW) absorbers with high performance. Since the effects of dipoles on impedance matching and EMW absorption are crucial for the development of novel absorbers, the polarization attenuation dependence on defect engineering should be understood at micro- and macro-scales. In this paper, it is found that the defect-rich WS2 nanoflowers synthesized by the cold plasma method possess excellent EMW absorption properties. Cold plasma treatment of materials is easy to perform and maintains the original shape of the material to a high degree. The formation of defects results in abundant electrochemically active sites, increased multiple reflection losses, improved dielectric properties and impedance matching in the materials. The RLmin of the defect-rich material with a thickness of 3.19 mm is as high as −54.36 dB at 8.16 GHz, and the effective absorption bandwidth is 4.72 GHz. The results reveal that the formation of defective vacancies enhances the effects of dipole polarization of the material on improving its EMW absorption properties. Thus, this work provides not only a facile preparation route for novel EMW-absorbing materials, but also a new strategy for tunning defects in transition metal disulfides.
KW - Cold plasma
KW - Defect engineering
KW - Electromagnetic wave absorption
KW - Transition metal disulfides
UR - http://www.scopus.com/inward/record.url?scp=85189557372&partnerID=8YFLogxK
U2 - 10.1016/j.jmst.2024.01.085
DO - 10.1016/j.jmst.2024.01.085
M3 - Article
AN - SCOPUS:85189557372
SN - 1005-0302
VL - 194
SP - 193
EP - 202
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
ER -