Co-Doped Porous Carbon/Carbon Nanotube Heterostructures Derived from ZIF-L@ZIF-67 for Efficient Microwave Absorption.

As displayed in Figure 5 a,b, the real and imaginary parts of the permittivity for all samples exhibit a decreasing trend with increasing frequency, showing typical dispersive behaviour, which is often attributed to dipole orientation polarization [ 55 , 56 ].

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