Liu Yijie, Zhou Jintang, Li Chenchen, Zhang Henghui, Wang Yucheng, Yan Yi, Duan Lvtong, Cheng Zhenyu, Ma Yao, Yao Zhengjun
College of Materials Science and Technology; Key Laboratory of Material Preparation and Protection for Harsh Environment; Nanjing University of Aeronautics and Astronautics, Nanjing, 211100, China.
The College of Mechanical and Electrical Engineering; Nanjing University of Aeronautics and Astronautics, Nanjing, 211100, China.
Nat Commun. 2025 Jan 2;16(1):202. doi: 10.1038/s41467-024-55776-9.
With the development of nanotechnology, nano-functional units of different dimensions, morphologies, and sizes exhibit the potential for efficient microwave absorption (MA) performance. However, the multi-unit coupling enhancement mechanism triggered by the alignment and orientation of nano-functional units has been neglected, hindering the further development of microwave absorbing materials (MAMs). In this paper, two typical ZIF-derived nanomaterials are self-assembled into two-dimensional ordered polyhedral superstructures by the simple ice template method. The nano-functional units exhibit distinctive dielectric-sensitive behaviors after self-assembling into two-dimensional ordered arrays. The modified 2D ordered polyhedral superstructures not only inherit the atomic-level doping and well-designed shell structure, but also further amplify the loss properties to realize the multi-scale modulated MA response. Satisfactory MA performance in C, X and Ku bands is finally achieved. In particular, the ultra-broadband microwave absorption bandwidth (EAB) of 6.41 GHz is realized at 1.82 mm thickness. Our work demonstrates the two-dimensional ordered array-induced multiscale polarization behavior, providing a direction to fully utilize the potential of wave-absorbing functional units.
随着纳米技术的发展，不同维度、形态和尺寸的纳米功能单元展现出高效微波吸收（MA）性能的潜力。然而，由纳米功能单元的排列和取向引发的多单元耦合增强机制一直被忽视，这阻碍了微波吸收材料（MAMs）的进一步发展。本文通过简单的冰模板法将两种典型的ZIF衍生纳米材料自组装成二维有序多面体超结构。纳米功能单元自组装成二维有序阵列后表现出独特的介电敏感行为。改性的二维有序多面体超结构不仅继承了原子级掺杂和精心设计的壳结构，还进一步放大了损耗特性以实现多尺度调制的MA响应。最终在C、X和Ku波段实现了令人满意的MA性能。特别是，在1.82毫米厚度下实现了6.41吉赫兹的超宽带微波吸收带宽（EAB）。我们的工作展示了二维有序阵列诱导的多尺度极化行为，为充分利用吸波功能单元的潜力提供了一个方向。
