Dielectric Loss Regulation and Efficient Electromagnetic Wave Absorption of CuxSy-MoS2 Heterostructure

Abstract

Abstract: Molybdenum disulfide (MoS₂) has attracted much attention in the field of electromagnetic wave (EMW) absorption due to its high specific surface area and unique electronic structure, but its high conductivity leads to poor EMW absorption performance. To address this issue, this work introduces Cu_xS_y nanoparticles and constructs a unique Cu_xS_y-MoS₂ heterostructure to achieve appropriate impedance matching and attenuation capabilities. By regulating Cu_xS_y nanoparticles, the dielectric loss capacity of heterostructure is adjusted. As a result, Cu_xS_y-MoS₂ exhibits excellent EMW absorption performance at low, medium and high frequencies. The Cu_xS_y-MoS₂ heterostructure shows a reflection loss (R_L) of -72.77 dB at a frequency of 12.68 GHz, with a matching thickness of only 1.99 mm, surpassing most metal sulfide heterostructures. Moreover, it also exhibits a wide effective absorption bandwidth (EAB), reaching 5.1 GHz (12.9~18.0 GHz) at 1.73 mm. This work provides a new strategy for designing MoS₂-based absorption materials with strong absorption, broadband and thin matching thickness.

Key words: Cu_xS_y, MoS₂, heterostructure, dielectric loss, electromagnetic wave absorption

CLC Number:

O441.4

JIANG Xiao, LI Bo, HE Bang, ZENG Xiaojun. Dielectric Loss Regulation and Efficient Electromagnetic Wave Absorption of Cu_xS_y-MoS₂ Heterostructure[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(2): 276-285.

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Dielectric Loss Regulation and Efficient Electromagnetic Wave Absorption of Cu_xS_y-MoS₂ Heterostructure

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