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Micro-/nano-voids guided two-stage film cracking on bioinspired assemblies for high-performance electronics

Author

Listed:
  • Weining Miao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yuxing Yao

    (Harvard University)

  • Zhiwei Zhang

    (The Ohio State University)

  • Chunping Ma

    (The Ohio State University)

  • Shengzhe Li

    (Imperial College London)

  • Jiayue Tang

    (Institute of Chemistry, Chinese Academy of Sciences)

  • He Liu

    (University of Chinese Academy of Sciences)

  • Zemin Liu

    (University of Chinese Academy of Sciences)

  • Dianyu Wang

    (Jilin University)

  • Michael A. Camburn

    (The Ohio State University)

  • Jen-Chun Fang

    (The Ohio State University)

  • Ruiran Hao

    (Institute of Chemistry, Chinese Academy of Sciences)

  • Xinyu Fang

    (The Ohio State University)

  • Shuang Zheng

    (Institute of Chemistry, Chinese Academy of Sciences)

  • Nan Hu

    (The Ohio State University)

  • Xiaoguang Wang

    (The Ohio State University)

Abstract

Current metal film-based electronics, while sensitive to external stretching, typically fail via uncontrolled cracking under a relatively small strain (~30%), which restricts their practical applications. To address this, here we report a design approach inspired by the stereocilia bundles of a cochlea that uses a hierarchical assembly of interfacial nanowires to retard penetrating cracking. This structured surface outperforms its flat counterparts in stretchability (130% versus 30% tolerable strain) and maintains high sensitivity (minimum detection of 0.005% strain) in response to external stimuli such as sounds and mechanical forces. The enlarged stretchability is attributed to the two-stage cracking process induced by the synergy of micro-voids and nano-voids. In-situ observation confirms that at low strains micro-voids between nanowire clusters guide the process of crack growth, whereas at large strains new cracks are randomly initiated from nano-voids among individual nanowires.

Suggested Citation

  • Weining Miao & Yuxing Yao & Zhiwei Zhang & Chunping Ma & Shengzhe Li & Jiayue Tang & He Liu & Zemin Liu & Dianyu Wang & Michael A. Camburn & Jen-Chun Fang & Ruiran Hao & Xinyu Fang & Shuang Zheng & Na, 2019. "Micro-/nano-voids guided two-stage film cracking on bioinspired assemblies for high-performance electronics," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11803-8
    DOI: 10.1038/s41467-019-11803-8
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