2D/2D coupled MOF/Fe composite metamaterials enable robust ultra–broadband microwave absorption

作者：Ning Qu, Hanxu Sun, Yuyao Sun, Mukun He, Ruizhe Xing, Junwei Gu, Jie Kong · 发表于：Nature Communications · 年份：2024 · DOI：10.1038/s41467-024-49762-4 · 被引用次数：324 · 研究领域：Electromagnetic wave absorption materials、Metamaterials and Metasurfaces Applications、Advanced Antenna and Metasurface Technologies

Abstract The combination between macroscopic structure designs and microscopic material designs offers tremendous possibilities for the development of advanced electromagnetic wave (EMW) absorbers. Herein, we propose a metamaterial design to address persistent challenges in this field, including narrow bandwidth, low–frequency bottlenecks, and, particularly, the urgent issue of robustness (i.e., oblique, and polarized incidence). Our absorber features a semiconductive metal-organic framework/iron 2D/2D assembly (CuHT–FCIP) with abundant crystal/crystal heterojunctions and strong magneto-electric coupling networks. This design achieves remarkable EMW absorption across a broad range (2 to 40 GHz) at a thickness of just 9.3 mm. Notably, it maintains stable performance against oblique incidence (within 75°) and polarizations (both transverse electric and transverse magnetic). Furthermore, the absorber demonstrates high specific compressive strength (201.01 MPa·cm 3 ·g −1 ) and low density (0.89 g·cm −3 ). This advancement holds promise for developing robust EMW absorbers with superior performance.