Fig. 7.

Reflection loss curves and 3D plots of a 3D NC, b 3D Ni–NC, c 3D Cu–NC, d 3D Co–NC, e 3D Fe–NC, and f 3D Mn–NC. g Comparison of R_{L, min} and EAB₁₀ for 3D M–NCs and 3D NC. h SRL_l and SRL_lt values of 3D Mn–NC with the reported carbon-based absorbers