Composition and structure control of ultralight graphene foam for high-performance microwave absorption

Economical synthesis of composites of FeNi alloy nanoparticles evenly dispersed in two-dimensional reduced graphene oxide as thin and effective electromagnetic wave absorbers

“…The dielectric loss tangent (tan d dielectric and magnetic losses, generally, a higher value represents more energy loss due to its conversion to thermal energy or other form of energy. 54,55 As displayed in Fig. 9a, for all samples, the values of dielectric loss tangent are higher than those of magnetic loss tangent except for small scale of frequency domain, making clear that dielectric loss makes a major contribution to the attenuation of electromagnetic wave.…”

Excellent Microwave Absorption and Electromagnetic Interference Shielding Based on Reduced Graphene Oxide@MoS2/Poly(Vinylidene Fluoride) Composites

“…Ah igher dielectric loss tangent meanst hat more microwavee nergy is absorbed. [31] The tendencies of dielectric loss versusf requency are exhibited in Figure S4 in the Supporting Information. Permittivity and permeability are responsible for electronic polarization,i on polarization, and intrinsic dipole polarization.…”

Facile solvothermal synthesis of novel hetero-structured CoNi–CuO composites with excellent microwave absorption performance

“…7 As has been reported, an efficient EMW absorbing material should simultaneously possess strong absorption intensity and broad-frequency bandwidth, and the primary function of EMW absorption is to attenuate radiation with a dielectric material that interacts directly with the electromagnetic eld. 1,8 Therefore, on one hand, to address this issue, the absorbing materials should be designed with favorable dielectricity. On the other hand, the secondary mechanism of EMW absorbing requires absorption of EMW due to the material's magnetic and/or electric dipoles interacting with the radiation, it thus suggests that absorbing materials need to be magnetical and/or conductive.…”