A 3D multifunctional nitrogen-doped RGO-based aerogel with silver nanowires assisted self-supporting networks for enhanced electromagnetic wave absorption

Solvothermally Synthesized Co(CoO)/Ti3C2Tx/TiO2 Nanocomposites for Enhanced Microwave Absorption

“…The permittivity and permeability of Co­(CoO)/Ti 3 C 2 T x /TiO 2 nanocomposites were measured in order to explore their absorbing capabilities. The imaginary parts (ε″ and μ″) denote the wasting capacity of the microwave, while the real parts (ε′ and μ′) explain the storage ability of the microwave. − …”

Interface Engineering of Heterogeneous NiSe2‐CoSe2@C@MoSe2 for High‐Efficient Electromagnetic Wave Absorption

“…[ 17 ] In addition, the charge accumulated at the heterogeneous interfaces between NiSe 2 ‐CoSe 2 mixtures and carbon shell, between carbon shell and MoSe 2 can contribute to interfacial polarization processes. [ 36 ] The variation curves of the complex permeability and magnetic loss tangent (tan δ µ ) for all samples are shown in Figure 6d–f. The curves of all samples showed a similar downward trend, indicating similar magnetic loss behavior.…”

“…The EMWA performance of NiSe 2 ‐CoSe 2 @C@MoSe 2 composites depends on attenuation constant ( α ) and impedance matching properties. A higher α value is associated with the dissipation ability of EMW, which can be evaluated by the following equation: [ 35,36 ] $$$$\begin{eqnarray}&&\alpha \; = {{\sqrt 2 \pi f} \over c}\nonumber\\ &&\;\sqrt {\left( {{{\mu ''}}_r{{\varepsilon ''}}_r - {{\mu '}}_r{{\varepsilon '}}_r} \right) + \sqrt {{{\left( {{{\mu ''}}_r{{\varepsilon ''}}_r - {{\mu '}}_r{{\varepsilon '}}_r} \right)}}^2 + {{\left( {{{\mu '}}_r{{\varepsilon ''}}_r + {{\mu ''}}_r{{\varepsilon '}}_r} \right)}}^2} } \end{eqnarray}$$$$…”

“…[43] The EMWA performance of NiSe 2 -CoSe 2 @C@MoSe 2 composites depends on attenuation constant (𝛼) and impedance matching properties. A higher 𝛼 value is associated with the dissipation ability of EMW, which can be evaluated by the following equation: [35,36]…”

Nanolayered Ceramic-Confined Graphene Aerogel with Conformal Heterointerfaces for Low-Frequency Microwave Absorption

“…In theory, enhanced interfacial polarization may result in a higher real permittivity and promote frequency dispersion behavior . Previous methods to regulate the relaxation behavior have focused on the construction of point-to-face (zero-dimensional [0D]/two-dimensional [2D]), ,, line-to-face (one-dimensional [1D]/2D), − and face-to-face (2D/2D) ,, heterogeneous interfaces between second phases and graphene nanosheets. For example, a capacitor-like structure between 0D CuS and 2D reduced GO (rGO) nanosheets with abundant interfaces can result in an interface dipole, giving rise to strong interfacial polarization .…”