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Hidden Area and Mechanical Nonlinearities in Freestanding Graphene

Ryan J. T. Nicholl, Nickolay V. Lavrik, Ivan Vlassiouk, Bernadeta R. Srijanto, and Kirill I. Bolotin
Phys. Rev. Lett. 118, 266101 – Published 27 June 2017
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Abstract

We investigated the effect of out-of-plane crumpling on the mechanical response of graphene membranes. In our experiments, stress was applied to graphene membranes using pressurized gas while the strain state was monitored through two complementary techniques: interferometric profilometry and Raman spectroscopy. By comparing the data obtained through these two techniques, we determined the geometric hidden area which quantifies the crumpling strength. While the devices with hidden area 0% obeyed linear mechanics with biaxial stiffness 428±10N/m, specimens with hidden area in the range 0.5%–1.0% were found to obey an anomalous nonlinear Hooke’s law with an exponent 0.1.

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  • Received 8 February 2017

DOI:https://doi.org/10.1103/PhysRevLett.118.266101

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Synopsis

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Crumpled Graphene

Published 27 June 2017

The crumpling of graphene sheets explains a “soft spot” in the material’s mechanical response.

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Authors & Affiliations

Ryan J. T. Nicholl1, Nickolay V. Lavrik2, Ivan Vlassiouk3, Bernadeta R. Srijanto2, and Kirill I. Bolotin1,4,*

  • 1Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
  • 2Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 4Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany

  • *Corresponding author. kirill.bolotin@fu-berlin.de

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Issue

Vol. 118, Iss. 26 — 30 June 2017

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