3D CuS/ZnS snowflakes as multi-waveband microwave absorbers

Developing advanced electromagnetic wave-absorbing materials capable of operating across multiple frequency bands remains a significant challenge. However, such materials have the potential to reform electromagnetic interference mitigation and communication technologies. Herein, a hydrothermal method was proposed to synthesize 3D CuS/ZnS snowflakes for microwave absorption. Experimental results demonstrate that 3D CuS/ZnS composites exhibit selective absorption of electromagnetic waves in multiple frequency bands. The surface morphology of these heterostructures significantly contributes to their microwave absorption properties in the X, and Ku bands. Notably, the reflection loss (RL) peak value of -43.60 dB and an effective (EAB) of 5.1 GHz were achieved at an absorber thickness of 2.7 mm. The synergistic interplay among various dielectric loss such as dipole and interfacial polarization was investigated to clarify the nanocomposite’s contribution to its superior electromagnetic wave absorption capabilities. Additionally, the radar cross section (RCS) of the absorber samples was calculated using CST Studio Suite, confirming the effectiveness of the absorbent coating in reducing RCS at various angles. It offers valuable insights into the development of advanced materials for electromagnetic absorption, potentially leading to technological advancements in practical applications such as radar cross section reduction.