@article{Sun2026, 
author = {Shujiang Sun and Shijie Liu and Zhanyu Shen and Zhe Feng and Wenkun Fei and Xu He and Wanping Zhang and Bo Li and Longlu Wang},
title = {Structural regulation of chitosan-assisted self-assembled MXene@1T-MoS2 composite aerogels for high-efficiency absorption Electromagnetic shielding performance},
year = {2026},
journal = {Nano Research},
keywords = {MXene, lyophilization, 1T-MoS2, electromagnetic interference shielding, low reflection, heterogeneous structure},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908766},
doi = {10.26599/NR.2026.94908766},
abstract = {Rapid development of the fifth-generation wireless communication technology (5G) has made electromagnetic interference (EMI) a critical threat to electronic operations and human health. To mitigate severe secondary scattering caused by impedance mismatch in traditional materials, this study proposes a chitosan-assisted self-assembly strategy for two-dimensional (2D) materials. Using directional freezing and freeze-drying, MXene@1T-MoS2/chitosan composite aerogels with a lamellar porous structure were successfully fabricated. The regulatory effects of chitosan viscosity on microscopic morphology, conductive network construction, and shielding performance were systematically investigated. Results show that medium-viscosity chitosan induces an optimal layered skeleton, enabling sufficient multiple reflection losses within the aerogel. To further enhance absorption-dominated shielding, metallic 1T-MoS2 was introduced to construct heterointerfaces. Characterization and electromagnetic analysis confirm that the synergy between 1T-MoS2, MXene, and the chitosan matrix significantly enhances interfacial and dipole polarization losses. Experimental results indicate that the composite aerogels exhibit excellent EMI shielding performance in the X-band, with the absorption coefficient increasing by 0.14 after the introduction of 1T-MoS2. Furthermore, far-field simulations reveal that the optimized aerogels achieve a remarkable radar cross-section (RCS) reduction, consistently maintaining scattered signal intensities below -20 dB·m2 across a wide angular range. Mechanism analysis reveals that the high shielding efficiency stems from the organic synergy of conductive loss, multi-component-induced polarization loss, and multiple reflection effects triggered by the lamellar porous structure. This study successfully achieves a fundamental shift in the shielding mechanism from interfacial reflection to high-efficiency absorption, providing a new experimental basis and design strategy for developing lightweight, high-absorption EMI shielding materials.}
}