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

Ning Qu, Hanxu Sun, Yuyao Sun, Mukun He, Ruizhe Xing (), Junwei Gu and Jie Kong ()
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Ning Qu: Northwestern Polytechnical University
Hanxu Sun: Northwestern Polytechnical University
Yuyao Sun: Northwestern Polytechnical University
Mukun He: Northwestern Polytechnical University
Ruizhe Xing: Northwestern Polytechnical University
Junwei Gu: Northwestern Polytechnical University
Jie Kong: Northwestern Polytechnical University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: 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·cm3·g−1) and low density (0.89 g·cm−3). This advancement holds promise for developing robust EMW absorbers with superior performance.

Date: 2024
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DOI: 10.1038/s41467-024-49762-4

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