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Elastic straining of free-standing monolayer graphene

Author

Listed:
  • Ke Cao

    (City University of Hong Kong)

  • Shizhe Feng

    (Tsinghua University)

  • Ying Han

    (City University of Hong Kong)

  • Libo Gao

    (City University of Hong Kong
    Xidian University
    Shenzhen Research Institute of City University of Hong Kong)

  • Thuc Hue Ly

    (City University of Hong Kong)

  • Zhiping Xu

    (Tsinghua University)

  • Yang Lu

    (City University of Hong Kong
    Shenzhen Research Institute of City University of Hong Kong
    City University of Hong Kong)

Abstract

The sp2 nature of graphene endows the hexagonal lattice with very high theoretical stiffness, strength and resilience, all well-documented. However, the ultimate stretchability of graphene has not yet been demonstrated due to the difficulties in experimental design. Here, directly performing in situ tensile tests in a scanning electron microscope after developing a protocol for sample transfer, shaping and straining, we report the elastic properties and stretchability of free-standing single-crystalline monolayer graphene grown by chemical vapor deposition. The measured Young’s modulus is close to 1 TPa, aligning well with the theoretical value, while the representative engineering tensile strength reaches ~50-60 GPa with sample-wide elastic strain up to ~6%. Our findings demonstrate that single-crystalline monolayer graphene can indeed display near ideal mechanical performance, even in a large area with edge defects, as well as resilience and mechanical robustness that allows for flexible electronics and mechatronics applications.

Suggested Citation

  • Ke Cao & Shizhe Feng & Ying Han & Libo Gao & Thuc Hue Ly & Zhiping Xu & Yang Lu, 2020. "Elastic straining of free-standing monolayer graphene," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-14130-0
    DOI: 10.1038/s41467-019-14130-0
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    Cited by:

    1. Yuan Hou & Jingzhuo Zhou & Zezhou He & Juzheng Chen & Mengya Zhu & HengAn Wu & Yang Lu, 2024. "Tuning instability in suspended monolayer 2D materials," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Chao Rong & Ting Su & Zhenkai Li & Tianshu Chu & Mingliang Zhu & Yabin Yan & Bowei Zhang & Fu-Zhen Xuan, 2024. "Elastic properties and tensile strength of 2D Ti3C2Tx MXene monolayers," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Shuang Wu & Jifen Wang & Huaqing Xie & Zhixiong Guo, 2020. "Interfacial Thermal Conductance across Graphene/MoS 2 van der Waals Heterostructures," Energies, MDPI, vol. 13(21), pages 1-13, November.

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