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Published on: September 23, 2018
Strain Relaxation in CVD Graphene: Wrinkling with Shear Lag
Merijntje S Bronsgeest1,2, Nedjma Bendiab1,3, Shashank Mathur1,2,3
1†Université Grenoble Alpes, F-38000, Grenoble, France.
Abstract:
We measure uniaxial strain fields in the vicinity of edges and wrinkles in graphene prepared by chemical vapor deposition (CVD), by combining microscopy techniques and local vibrational characterization. These strain fields have magnitudes of several tenths of a percent and extend across micrometer distances. The nonlinear shear-lag model remarkably captures these strain fields in terms of the graphene-substrate interaction and provides a complete understanding of strain-relieving wrinkles in graphene for any level of graphene-substrate coherency.
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