Constructing multiple hetero-interfaces with rGO supported globular shaped PEDOT/Fe3O4 toward high-efficiency electromagnetic wave attenuation

Developing electromagnetic wave-absorbing (EMWA) materials that offer robust absorption capabilities, broad operational bandwidth, and low weight remains a critical challenge. Achieving optimal absorption efficiency through the strategic integration of EMWA components is a promising approach. we report the fabrication and optimization of PEDOT/Fe₃O₄ anchored on a reduced graphene oxide (rGO) heterostructure as an effective EMWA material. Our results demonstrate that the electromagnetic synergy, enhanced by numerous hetero-interfaces, facilitates impedance matching and amplifies dielectric losses, magnetic losses, polarization, and multiple reflection phenomena. The EMWA performance of the PEDOT/Fe₃O₄/rGO heterostructure can be finely tuned by adjusting the rGO content, thereby optimizing microwave absorption properties. Due to its structural and compositional advantages, the minimum reflection loss (RL_min) reaches an impressive −52.4 dB at a thickness of 1.46 mm, covering an effective absorption bandwidth (EAB) exceeding 3.52 GHz. These findings establish critical benchmarks for the intentional design of multi-interface electromagnetic absorbers, offering high-efficiency wave absorption for practical applications in electromagnetic radiation management.