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Facile and Efficient Negative Permittivity Realization of Copper Microwire Polymer Metacomposites at X-Band Frequency

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Abstract

Negative permittivity is a unique and fascinating property which is essential for applications such as for a perfect lens and 100% electromagnetic wave absorption. Both positive and negative real permittivity are effectively modulated by commercially available low-cost copper microwire epoxy metacomposites. The influence of diameter and length of the copper wire and weight percentage in the polymer composite on the dielectric properties are investigated. Relative real permittivity of 3–240 was obtained in X-band frequency (8.2–12.4 GHz) by controlling the composition of the composites. Ultraweak relative negative permittivity of -5-0 is present for samples of Cu-2mm-70 wt.%/epoxy (EP) or Cu-5mm-50 wt.%/EP composites owing to the low-frequency plasmonic state of free electrons in the percolated networks. The as-prepared Cu/EP composites are promising for microwave manipulating metamaterials and related high-frequency devices.

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Acknowledgments

This work was supported by National Natural Science Foundation of China [51871146, 51803119]; National Key Research and Development Program of China [2021YFE0100500]; Zhejiang Natural Science Foundation [LR20E010001]; Zhejiang Key Research and Development Program [2021C01004]; Chao Kuang Piu High Tech Development Fund [2020ZL012]; Fundamental Research Funds for the Central Universities [2020XZZX002-10]; Aeronautical Science Foundation [2019ZF076002]; China Postdoctoral Science Foundation [2021M692756].

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Authors and Affiliations

  1. Institute for Composites Science Innovation (InCSI), School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Licheng Ju, Faxiang Qin & Huaxin Peng

  2. College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, China

    Qifa He & Runhua Fan

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  1. Licheng Ju
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  2. Qifa He
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Correspondence to Licheng Ju or Runhua Fan.

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Ju, L., He, Q., Qin, F. et al. Facile and Efficient Negative Permittivity Realization of Copper Microwire Polymer Metacomposites at X-Band Frequency. J. Electron. Mater. 51, 2107–2113 (2022). https://doi.org/10.1007/s11664-022-09483-0

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