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Research Article

A temperature-activated nanocomposite metamaterial absorber with a wide tunability

Weiwei Li1,2,§, Lingyu Zhao1,2,§, Zhaohe Dai1, Hao Jin1( ), Feng Duan1,2, Junchao Liu1,2, Zhihui Zeng1, Jun Zhao1( ), Zhong Zhang1( )
CAS Key Laboratory of Nanosystem and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
University of Chinese Academy of SciencesBeijing100149China

§Weiwei Li and Lingyu Zhao contributed equally to this work.

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Abstract

Novel thin and flexible broadband electromagnetic microwave absorbers are realized with nanocomposites and achieve a wide frequency tunability (from 10 to 17.2 GHz) by actively adjusting the resistance. The proposed absorbers are fabricated by scalable screen printing of optimized nanoparticle ink onto the flexible dielectric composite substrates. Based on the shape memory effects of the substrate and piezoresistive effect of the nanocomposite frequency selective surface, a controllable sheet resistance, and thereby tunable wave absorption performance, can be realized in a temperature-activated and dynamically stable manner. The results provide new dimensions for the design of active electromagnetic devices by utilizing previously underestimated intrinsic properties of the artificial materials and the smart behavior of polymer-based nanocomposites.

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Keywords

composite materialsflexible electronicsmetamaterialspolymeric materialsshape memory polymers

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Nano Research
Volume 11 Issue 7,
July 2018
Pages 3931-3942
DOI: 10.1007/s12274-018-1973-4

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Cite this article:
Li W, Zhao L, Dai Z, et al. A temperature-activated nanocomposite metamaterial absorber with a wide tunability. Nano Research, 2018, 11(7): 3931-3942. https://doi.org/10.1007/s12274-018-1973-4

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Received: 29 May 2017
Revised: 15 December 2017
Accepted: 28 December 2017
Published: 19 January 2018
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018