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Normalized power absorption of multilayered metamaterial showing gradient conductivity (black) and constant conductivity (blue). Simulations assume 9 conductive layers 150 μm thick and 10 dielectric layers 500 μm thick for an overall conductivity of 40 S/m. The insulating layers have properties of PC () and conductive layers of the gradient stack have a linear conductive gradient where . Inset shows stack with gradient where insulating and conductive layers are, respectively, white and gray (with darker color for higher CNT concentration).
Entanglement of dried CNT ink trapped between two polycarbonate sheets.
Frequency response of S-parameters (a) and normalized power absorption (b) for the multilayer having 8 CNT-PC composite conductive layers and 9 insulating layers. Global thickness of the multilayer reaches 6.9 mm.
Frequency response of S-parameters (a) and normalized power absorption (b) for the multilayer having 9 layers sandwiched between 9 insulating layers. Total thickness of multilayer does not exceed 2.7 mm.
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