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Flexible conductor fabrication via silver nanowire deposition on a polydopamine-modified pre-strained substrate

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Abstract

We fabricated a flexible conductor by depositing silver nanowires (AgNWs) on the surface of pre-strained polydopamine-modified polyurethane (PU) film. The polydopamine layer on the PU film created a highly hydrophilic surface that enhanced AgNWs adhesion to the PU film. When the pre-strained film was released, the PU film surfaces formed a uniformly buckled conductive layer. After embedding this substrate in polydimethylsiloxane (PDMS), a PU/AgNWs/PDMS flexible conductor was obtained. This flexible conductor can adapt to stretching (up to 20 % strain) and bending (3 mm bending radius) with slight changes in resistance, which was maintained at ~0.95 Ω after 1000 cycle tests. The resistance of the flexible conductor was 5.4 Ω under mechanical elongation of up to ~50 %, further demonstrating its obvious stretchable characteristics. Wavy AgNWs film-based stretchable conductors fabricated using a simple buckling approach could play an important role in the future development of flexible electronics.

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Acknowledgments

We are grateful for the financial supports from National Natural Science Foundation of China (Grant No. 21407134).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Xindu, 610500, Sichuan, People’s Republic of China

    Liming Li & Tailiang Zhang

  2. Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, Sichuan, People’s Republic of China

    Yu Liu & Chunhua Zhu

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  1. Liming Li
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  2. Tailiang Zhang
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  3. Yu Liu
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  4. Chunhua Zhu
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Correspondence to Tailiang Zhang or Chunhua Zhu.

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Li, L., Zhang, T., Liu, Y. et al. Flexible conductor fabrication via silver nanowire deposition on a polydopamine-modified pre-strained substrate. J Mater Sci: Mater Electron 27, 3193–3201 (2016). https://doi.org/10.1007/s10854-015-4144-3

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