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

Ryan J.T. Nicholl, Hiram J. Conley, Nickolay V. Lavrik, Ivan Vlassiouk, Yevgeniy S. Puzyrev, Vijayashree Parsi Sreenivas, Sokrates T. Pantelides and Kirill I. Bolotin ()
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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

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: 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

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9789

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DOI: 10.1038/ncomms9789

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