Design of Ferromagnetic-Dielectric Nanoheterostructures with Tunable Magnetoelectric Properties for Microwave Absorption

Molybdenum disulfide (MoS2) has garnered considerable research interest owing to its distinctive physical and chemical properties, as well as its broad application potential across various fields. To enhance impedance matching and improve the electromagnetic wave (EMW) absorption performance of MoS2, a two-dimensional nanoheterostructured FeNi/MoS2 composite was developed. First, few-layer MoS2 nanosheets were exfoliated from natural molybdenite via ion intercalation, upon and between which FeNi nanoparticles were uniformly deposited. The unique layered architecture of MoS2 combined with the high electrical conductivity and abundant heterogeneous interfaces introduced by FeNi nanoparticles synergistically promoted electromagnetic energy dissipation through conductive loss, interfacial polarization, and multiple scattering/reflection. The minimum reflection loss reached −63.72 dB at a composite thickness of 1.51 mm, and an effective absorption bandwidth of 5.08 GHz was achieved at a composite thickness of only 1.54 mm. Furthermore, the low reflection coefficient of the composite in simulations suggested its promising application as a metasurface material. The findings of this study highlight the EMW absorption capability of a two-dimensional nanoheterostructure comprising MoS2 nanosheets and FeNi nanoalloys, paving the way for MoS2-based absorbers with strong EMW absorption and broad bandwidth.