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Controlled growth of single-crystalline metal nanowires via thermomigration across a nanoscale junction

Author

Listed:
  • De-Gang Xie

    (Xi’an Jiaotong University)

  • Zhi-Yu Nie

    (Xi’an Jiaotong University)

  • Shuhei Shinzato

    (Osaka University)

  • Yue-Qing Yang

    (Xi’an Jiaotong University)

  • Feng-Xian Liu

    (Tsinghua University)

  • Shigenobu Ogata

    (Osaka University
    Kyoto University)

  • Ju Li

    (Xi’an Jiaotong University
    Massachusetts Institute of Technology)

  • Evan Ma

    (Xi’an Jiaotong University
    Johns Hopkins University)

  • Zhi-Wei Shan

    (Xi’an Jiaotong University)

Abstract

Mass transport driven by temperature gradient is commonly seen in fluids. However, here we demonstrate that when drawing a cold nano-tip off a hot solid substrate, thermomigration can be so rampant that it can be exploited for producing single-crystalline aluminum, copper, silver and tin nanowires. This demonstrates that in nanoscale objects, solids can mimic liquids in rapid morphological changes, by virtue of fast surface diffusion across short distances. During uniform growth, a thin neck-shaped ligament containing a grain boundary (GB) usually forms between the hot and the cold ends, sustaining an extremely high temperature gradient that should have driven even larger mass flux, if not counteracted by the relative sluggishness of plating into the GB and the resulting back stress. This GB-containing ligament is quite robust and can adapt to varying drawing directions and velocities, imparting good controllability to the nanowire growth in a manner akin to Czochralski crystal growth.

Suggested Citation

  • De-Gang Xie & Zhi-Yu Nie & Shuhei Shinzato & Yue-Qing Yang & Feng-Xian Liu & Shigenobu Ogata & Ju Li & Evan Ma & Zhi-Wei Shan, 2019. "Controlled growth of single-crystalline metal nanowires via thermomigration across a nanoscale junction," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12416-x
    DOI: 10.1038/s41467-019-12416-x
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    Cited by:

    1. Seunghan Song & Fredrik Laurell & Bailey Meehan & Thomas W. Hawkins & John Ballato & Ursula J. Gibson, 2022. "Localised structuring of metal-semiconductor cores in silica clad fibres using laser-driven thermal gradients," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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