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Ultrafast growth of nanocrystalline graphene films by quenching and grain-size-dependent strength and bandgap opening

Author

Listed:
  • Tong Zhao

    (Chinese Academy of Sciences
    University of Science and Technology of China)

  • Chuan Xu

    (Chinese Academy of Sciences)

  • Wei Ma

    (Chinese Academy of Sciences
    University of Science and Technology of China)

  • Zhibo Liu

    (Chinese Academy of Sciences)

  • Tianya Zhou

    (Chinese Academy of Sciences
    University of Science and Technology of China)

  • Zhen Liu

    (Peking University)

  • Shun Feng

    (Chinese Academy of Sciences)

  • Mengjian Zhu

    (National University of Defense Technology)

  • Ning Kang

    (Peking University)

  • Dong-Ming Sun

    (Chinese Academy of Sciences)

  • Hui-Ming Cheng

    (Chinese Academy of Sciences
    University of Science and Technology of China
    Tsinghua University)

  • Wencai Ren

    (Chinese Academy of Sciences
    University of Science and Technology of China)

Abstract

Nanocrystallization is a well-known strategy to dramatically tune the properties of materials; however, the grain-size effect of graphene at the nanometer scale remains unknown experimentally because of the lack of nanocrystalline samples. Here we report an ultrafast growth of graphene films within a few seconds by quenching a hot metal foil in liquid carbon source. Using Pt foil and ethanol as examples, four kinds of nanocrystalline graphene films with average grain size of ~3.6, 5.8, 8.0, and 10.3 nm are synthesized. It is found that the effect of grain boundary becomes more pronounced at the nanometer scale. In comparison with pristine graphene, the 3.6 nm-grained film retains high strength (101 GPa) and Young’s modulus (576 GPa), whereas the electrical conductivity is declined by over 100 times, showing semiconducting behavior with a bandgap of ~50 meV. This liquid-phase precursor quenching method opens possibilities for ultrafast synthesis of typical graphene materials and other two-dimensional nanocrystalline materials.

Suggested Citation

  • Tong Zhao & Chuan Xu & Wei Ma & Zhibo Liu & Tianya Zhou & Zhen Liu & Shun Feng & Mengjian Zhu & Ning Kang & Dong-Ming Sun & Hui-Ming Cheng & Wencai Ren, 2019. "Ultrafast growth of nanocrystalline graphene films by quenching and grain-size-dependent strength and bandgap opening," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12662-z
    DOI: 10.1038/s41467-019-12662-z
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