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Electromagnetic irradiation has caused environmental pollution and harmful effects on human health. The use of effective materials to attenuate electromagnetic energy is urgently required. In this study, Fe 3 O 4 nanoparticles (NPs) decorated on a CuS platelet-based sphere (CuS/Fe 3 O 4 ) with popcorn chicken-like micromorphology were synthesized through a solvothermal deposition method. The effects of reaction temperature and quantity of Fe 3 O 4 NPs on the heterostructures, morphologies and electromagnetic absorption (EA) properties of the heterostructures were investigated. CuS/Fe 3 O 4 heterostructures exhibited remarkable enhancement in comparison with pure Fe 3 O 4 NPs and the CuS platelet-based sphere. With the contribution from dielectric and magnetic losses, a CuS/Fe 3 O 4 heterostructure-loaded composite could achieve a minimum reflection loss (RL) of -61.32 dB at 14.00 GHz and an effective EA bandwidth (≤-10 dB) of 4.15 GHz at a thickness of only 1.5 mm simultaneously. The current study indicates that the CuS/Fe 3 O 4 heterostructures can potentially be applied as advanced electromagnetic absorbers.

rsc advances

Fe<sub>3</sub>O<sub>4</sub> nanoparticles decorated on a CuS platelet-based sphere: a popcorn chicken-like heterostructure as an ideal material against electromagnetic pollution

Fe3O4 nanoparticles decorated on a CuS platelet-based sphere: a popcorn chicken-like heterostructure as an ideal material against electromagnetic pollution

Fe₃O₄ nanoparticles decorated on a CuS platelet-based sphere: a popcorn chicken-like heterostructure as an ideal material against electromagnetic pollution