Hollow multi-layer bowknot like nanoparticles surface modified by TMDs derived flexible fiber membranes for electromagnetic wave absorption

Through extensive literature review, it has been found that the influence of material morphology on absorption performance cannot be ignored. Although the adjustment of material morphology is still in an immature stage, its significant impact on absorption performance cannot be denied. In order to fully leverage the influence of morphology on materials, in this study, carbon fiber composite Cu/Cu2O coated with multiple layers of MoS2 is formed by appropriately adjusting the hydrothermal and carbonization temperature, in which the bow-shaped Cu/Cu2O (BT) composite carbon fiber was uniformly coated with flower like MoS2, and the loss mechanism is effectively adjusted by adjusting the morphology of BT. The introduction of carbon fibers and the coating of MoS2 provide suitable dielectric loss. The obtained Cu/Cu2O-CF@MoS2 (BCM) exhibits excellent electromagnetic wave absorption performance. The results show that when the thickness is 4 mm, the minimum reflection loss (RLmin) of BCM is −56 dB, and the maximum effective absorption bandwidth (EAB) is 4.14 GHz. We believe that the improvement in performance benefits from specific structural design and appropriate dielectric constant. Therefore, our research provides strategies for adjusting the material's absorption performance through structural design.