Enhancing Low-Frequency Microwave Absorption Through Structural Polarization Modulation of MXenes

作者：Bo Wei Shan, Yang Wang, Xinyi Ji, Yi Huang · 发表于：Nano-Micro Letters · 年份：2024 · DOI：10.1007/s40820-024-01437-x · 被引用次数：161 · 研究领域：Electromagnetic wave absorption materials、Advanced Antenna and Metasurface Technologies、Metamaterials and Metasurfaces Applications

Two-dimensional carbon-based materials have shown promising electromagnetic wave absorption capabilities in mid- and high-frequency ranges, but face challenges in low-frequency absorption due to limited control over polarization response mechanisms and ambiguous resonance behavior. In this study, we propose a novel approach to enhance absorption efficiency in aligned three-dimensional (3D) MXene/CNF (cellulose nanofibers) cavities by modifying polarization properties and manipulating resonance response in the 3D MXene architecture. This controlled polarization mechanism results in a significant shift of the main absorption region from the X-band to the S-band, leading to a remarkable reflection loss value of - 47.9 dB in the low-frequency range. Furthermore, our findings revealed the importance of the oriented electromagnetic coupling in influencing electromagnetic response and microwave absorption properties. The present study inspired us to develop a generic strategy for low-frequency tuned absorption in the absence of magnetic element participation, while orientation-induced polarization and the derived magnetic resonance coupling are the key controlling factors of the method.