Ti₃ C₂ T_x /MoS₂ Self-Rolling Rod-Based Foam Boosts Interfacial Polarization for Electromagnetic Wave Absorption

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• Heterogeneous interfaces enhance electromagnetic wave absorption (EMA) via interfacial polarization.
• Simple structures (particles, rods, flakes) exhibit weak interfacial polarization and can cause electromagnetic reflection due to high conductivity.
• Rational geometric design is needed to improve interfacial polarization and reduce conductivity for better EMA materials.

Purpose of the Study:

• To design a novel micro/nanostructure for enhanced interfacial polarization and electromagnetic wave absorption.
• To develop an ultralight dielectric material with high EMA performance.
• To investigate the role of rational geometric structures in EMA materials.

Main Methods:

• Fabrication of Ti3C2Tx/MoS2 self-rolling rod-based foam using differential surface tensions.
• Characterization of the material's structure and electromagnetic wave absorption properties.
• Electromagnetic wave absorption simulations using CST microwave studio.

Main Results:

• The Ti3C2Tx/MoS2 self-rolling rod foam exhibits excellent interfacial polarization.
• The high aspect ratio rods enhance polarization loss and facilitate foam construction.
• The material achieves effective absorption across the entire X band (8.2-12.4 GHz) at an ultralow density of 0.009 g cm⁻³ and a thickness of 3.3 mm.

Conclusions:

• The self-rolling rod structure significantly enhances interfacial polarization and EMA performance.
• The proposed Ti3C2Tx/MoS2 foam offers a promising solution for lightweight, high-performance electromagnetic wave absorbers.
• This work provides insights into rational geometric design for next-generation EMA materials.