Two-dimensional nanosheets of MoS2: a promising material with high dielectric properties and microwave absorption performance

Nanoscale
Ming-Qiang NingHai-Bo Jin

Abstract

In this study, few-layered MoS2 nanosheets (MoS2-NS) were obtained via the top-down exfoliation method from bulk MoS2 (MoS2-Bulk), and the dielectric properties and microwave absorption performance of MoS2-NS were first reported. The dimension-dependent dielectric properties and microwave absorption performance of MoS2 were investigated by presenting a comparative study between MoS2-NS and MoS2-Bulk. Our results show that the imaginary permittivity (ε'') of MoS2-NS/wax is twice as large as that of MoS2-Bulk/wax. The minimum reflection loss (RL) value of MoS2-NS/wax with 60 wt% loading is -38.42 dB at a thickness of 2.4 mm, which is almost 4 times higher than that of MoS2-Bulk/wax, and the corresponding bandwidth with effective attenuation (<-10 dB) of MoS2-NS/wax is up to 4.1 GHz (9.6-13.76 GHz). The microwave absorption performance of MoS2-NS is comparable to those reported in carbon-related nanomaterials. The enhanced microwave absorption performance of MoS2-NS is attributed to the defect dipole polarization arising from Mo and S vacancies and its higher specific surface area. These results suggest that MoS2-NS is a promising candidate material not only in fundamental studies but also in practical microwave applications.

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Citations

Apr 8, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·U QumarS Ali
Nov 8, 2016·Physical Chemistry Chemical Physics : PCCP·Xiaolong LuWenbo Liu
Jun 9, 2020·Colloids and Surfaces. B, Biointerfaces·Jiaying LuJingjing Li
Nov 19, 2018·Journal of Colloid and Interface Science·Zhaoyong JinYuanhong Xu
Dec 11, 2020·Scientific Reports·Ramsha KhanRahim Jan
Oct 5, 2020·Advances in Colloid and Interface Science·Fail SultanovOlzhas Daulbayev
Apr 27, 2021·ACS Applied Materials & Interfaces·Yang YangYadong Yin
Aug 5, 2017·ACS Applied Materials & Interfaces·Can ZhangZhongyuan Liu

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