Multifunctional MXene-based composite films with simultaneous terahertz/gigahertz wave shielding performance for future 6G communication

Abstract

The MXene/polyaramid composite film displays strong EMI shielding performance in both terahertz and gigahertz bands, ultrahigh tensile strength, good heat resistance and excellent harsh-environment stability.

3D Architectural MXene‐based Composite Films for Stealth Terahertz Electromagnetic Interference Shielding Performance

“…All the composite films tested in our study have total EMI shielding values higher than the qualified shielding efficiency (>10 dB) in the whole range of the terahertz band. [ 43 ] In these composite films, the characteristics of high electrical conductivity, strong absorption, 3D pyramidal FSS reflective surface, multiple internal reflections, and interfacial MXene layers scattering together contribute to the high stealth EMI shielding in the terahertz region. Enhancement of the electrical conductivity is one of the primary reasons for the increase in total EMI SE due to the increasing content of MXenes.…”

Flexible CNT-MXene-CNT Film with Low Surface Conductance for High- and Low-Power Electromagnetic Absorption Protection

“…Extensive use of various new technologies on the battlefield poses serious threats to our military information security. , On the other hand, with the continuous progress of terahertz (THz) generation and modulation technology, high-power electromagnetic weapons have officially moved from the GHz band (0.3–300 GHz) to the THz band (0.1–10 THz) . They are widely used in 6G communications, satellite communications, and short-distance optical fiber-combined encrypted transmission . However, the electronic devices working in this band are more sensitive to strong electromagnetic shocks.…”

An artificially re-structured PEDOT:PSS/konjac glucomannan sponge toward high-performance electromagnetic interference shielding from gigahertz to terahertz bands

“…Previously, carbonaceous materials and MXenes have been widely reported in broadband EMI shielding owing to their high electrical conductivity. [11][12][13][14][15][16][17] However, these anticipated and promising properties are generated by several sophisticated and complicated synthesis processes on account of the unstable nature of aqueous solution of carbonaceous materials and MXenes. 18,19 Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), one of the most reported and industrialized conductive polymers, possesses remarkable EMI shielding properties due to its high electron conductivity.…”

“…Previously, carbonaceous materials and MXenes have been widely reported in broadband EMI shielding owing to their high electrical conductivity. 11–17 However, these anticipated and promising properties are generated by several sophisticated and complicated synthesis processes on account of the unstable nature of aqueous solution of carbonaceous materials and MXenes. 18,19…”

“…(f) Tan d, (g) reflection loss value and (h) absolute value of 1 − Z of CG and PPK sponges. (i) Direct comparison of the THz EMI shielding performance of PPK sponges (marked as star) in this work with those of prevailing materials[14][15][16]45,[58][59][60][61][62][63][64][65] (marked as circles and squares), including MXene-dominated, carbon-dominated, metal-dominated and semiconductor-dominated materials.…”