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Oriented magnetic liquid metal-filled interlocked bilayer films as multifunctional smart electromagnetic devices

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Abstract

Smart electromagnetic functional devices prepared based on electromagnetic wave responsive materials will provide more convenience for human life in the future. Here, we prepare oriented magnetic liquid metal droplet-filled polydimethylsiloxane films with micropillar array patterned surfaces, and further assemble them into bilayer films with interlocked structures. Once compressed, the increase in conductivity of the film due to the tunneling effect between microarrays and the elongation of liquid metal droplets leads to a rapid increase in electromagnetic interference shielding performance. Accordingly, a tunable electromagnetic interference shielding material with high sensitivity and wide control range is obtained, which has potential applications in electromagnetic wave control systems and intelligent electromagnetic protection systems. Meanwhile, we assemble a strain sensor and a magnetic sensor, which can precisely sense pressure and magnetic field according to changes in electromagnetic signal and electrical signal, respectively.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 51971008, U1832138, 51731002, and 51671010), Natural Science Foundation of Beijing Municipality (No. 2212033).

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  1. School of Materials Science and Engineering, Beihang University, Beijing, 100191, China

    Jinjin Li, Yue Zhang, Xufeng Li, Chunyan Chen, Haihan Zou, Peng Yi, Xiaofang Liu & Ronghai Yu

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  1. Jinjin Li
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  2. Yue Zhang
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Correspondence to Peng Yi or Xiaofang Liu.

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Li, J., Zhang, Y., Li, X. et al. Oriented magnetic liquid metal-filled interlocked bilayer films as multifunctional smart electromagnetic devices. Nano Res. 16, 1764–1772 (2023). https://doi.org/10.1007/s12274-022-4843-z

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