ArticleScientific reports2026
GO@CNT@Fe₃O₄@CuO quaternary nanohybrids enhance dielectric-magnetic synergy for high-performance epoxy-based electromagnetic absorbers.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study introduces a novel quaternary GO@CNT@Fe₃O₄@CuO core-shell nanohybrid designed to overcome impedance mismatch limitations in electromagnetic (EM) absorbers. Through stepwise synthesis, we integrated dielectric (GO, CNT), magnetic (Fe₃O₄), and semiconducting (CuO) components to create synergistic loss mechanisms. When incorporated at only 5 wt% into epoxy resin, the nanocomposite achieved exceptional X-band absorption with a minimum reflection loss of - 37.5 dB at 10.25 GHz and an effective absorption bandwidth of 3.2 GHz (9.0-12.2 GHz) at 5.0 mm thickness. The enhanced performance stems from balanced complex permittivity (ε' = 6.1, ε″ = 2.6) and permeability (µ' = 1.28, µ″ = 0.19), enabling optimal impedance matching and multi-mechanism attenuation through conduction loss, interfacial polarization, and magnetic resonance. This work establishes a design principle for low-loading, high-efficiency EM absorbers suitable for 5G and aerospace applications.
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