Facile construction of VS₂@GNSs composites with 1D/2D hierarchical structures for efficient electromagnetic wave absorption

With the extensive production of current multifarious electronic devices, corresponding electromagnetic pollution issues have been increasingly exacerbated. In response to these challenges, herein, VS₂ nanorods were uniformly grafted on graphene nanosheets (GNSs) fabricated through a facile ball milling method to construct 1D/2D hierarchical VS₂@GNSs composites with terrific electromagnetic wave (EMW) absorption properties. Specifically, the minimal reflection loss (RL_min) of VS₂@GNSs composites could reach −49.83 dB at 1.83 mm, and an ultra-broad effective absorption bandwidth (EAB) of 6.72 GHz was attained when the matching thickness was 1.96 mm, attributable to the distinguished impedance matching characteristics and EMW attenuation capacities of 1D/2D VS₂@GNSs composites. In addition, computer simulation technology (CST) full-wave simulation further confirmed VS₂@GNSs composites manifested remarkable radar scattering cross-section (RCS) suppression in real-world application scenarios, with the RCS reduction value of up to 20.38 dB m² compared to metallic substrate. This work proposed the theoretical instruction and experimental basis for the design and fabrication of high-performance stealth materials.