Ti ₃ C ₂ T _x MXene‐Based Superhydrophobic Broadband Terahertz Absorber with Large Pore‐Size Foam Architecture

Porous polymer-based Terahertz (THz) absorbers possess strong absorption with broadband, lightweight, and flexible features. Thus these are widely desired in THz electromagnetic shielding, radar-cross-section reduction, radiometer calibration, etc. However, the harsh environment of humidity, corrosiveness, dustiness undermines performance service lifetime porous absorbers. Here, based on Ti3C2Tx MXene sponge composite foam (MSF), a superhydrophobic broadband absorber large pore-size architecture by joint hydrophobic strategy is realized. Results show that apparent contact angles roll-off modified MSF reached 159.0° 7.6°, while maintaining an ultra-high rate 99.6% frequency range 0.3–1.2 THz. Furthermore, special Micro-Nano hierarchical structures render bounce-off ability to droplets aqueous solution. These water-repellent properties endow versatility self-cleaning anti-corrosion, thus can be applied many scenarios including remote sensing, communication, security screening as well.