Development of sulfide-doped Graphene/Fe3O4 absorber with wide band electromagnetic absorption performance

Abstract Graphene has been confirmed as an ideal lightweight and high-performance electromagnetic (EM) absorber if used to deal with increasingly electromagnetic interference issue. However, the actual EM absorption performance of graphene is not desirable in a thin thickness which is due to poor impedance matching behavior and single conductive loss form. To overcome this difficulty, this research employed S doping and magnetic Fe 3 O 4 nanoparticles loading strategies to boost EM attenuation ability by introduction of various EM loss forms, e.g. dipolar, interface, and magnetic loss ability etc. Besides, the impedance matching ability of SGN/Fe 3 O 4 has significant improved as compared to pure graphene, primarily owing to the sharply decrease of relative complex permittivity (e r ) values. The as-prepared S-doped graphene/Fe 3 O 4 (denote as SGN/Fe 3 O 4 ) absorber shows excellent wideband electromagnetic absorption property at a thin thickness of 2.0 mm which the frequency width with a reflection loss