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 obeyed linear mechanics with biaxial stiffness , specimens with hidden area in the range 0.5%–1.0% were found to obey an anomalous nonlinear Hooke’s law with an exponent .
- Received 8 February 2017
DOI:https://doi.org/10.1103/PhysRevLett.118.266101
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
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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