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The effect of intrinsic crumpling on the mechanics of free-standing graphene

Author

Listed:
  • Ryan J.T. Nicholl

    (Vanderbilt University)

  • Hiram J. Conley

    (Vanderbilt University)

  • Nickolay V. Lavrik

    (Center for Nanophase Materials Sciences, Oak Ridge National Laboratory)

  • Ivan Vlassiouk

    (Oak Ridge National Laboratory)

  • Yevgeniy S. Puzyrev

    (Vanderbilt University)

  • Vijayashree Parsi Sreenivas

    (Vanderbilt University)

  • Sokrates T. Pantelides

    (Vanderbilt University)

  • Kirill I. Bolotin

    (Vanderbilt University
    Freie Universität Berlin)

Abstract

Free-standing graphene is inherently crumpled in the out-of-plane direction due to dynamic flexural phonons and static wrinkling. We explore the consequences of this crumpling on the effective mechanical constants of graphene. We develop a sensitive experimental approach to probe stretching of graphene membranes under low applied stress at cryogenic to room temperatures. We find that the in-plane stiffness of graphene is 20–100 N m−1 at room temperature, much smaller than 340 N m−1 (the value expected for flat graphene). Moreover, while the in-plane stiffness only increases moderately when the devices are cooled down to 10 K, it approaches 300 N m−1 when the aspect ratio of graphene membranes is increased. These results indicate that softening of graphene at temperatures

Suggested Citation

  • Ryan J.T. Nicholl & Hiram J. Conley & Nickolay V. Lavrik & Ivan Vlassiouk & Yevgeniy S. Puzyrev & Vijayashree Parsi Sreenivas & Sokrates T. Pantelides & Kirill I. Bolotin, 2015. "The effect of intrinsic crumpling on the mechanics of free-standing graphene," Nature Communications, Nature, vol. 6(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9789
    DOI: 10.1038/ncomms9789
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