Adhesionless and near-ideal contact behavior of graphene on Cu thin film

Hammad, Mohamed;Adjizian, Jean Joseph;Sacré, Charles-Henri;Huet, Benjamin;Pardoen, Thomas;et.al.
(2017) Carbon — Vol. 122, p. 446-450 (2017)

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Abstract
Graphene coatings reduce surface adhesion owing to a low surface energy. In the present work, a single CVD-grown graphene layer on Cu is shown to modify the elastic contact behavior by eliminating adhesion. Nanoindentation load-displacement curves exhibit higher load bearing capacity for Cu/graphene in the elastic regime compared to bare Cu and a closer agreement with Hertz law. Molecular dynamics simulations confirm the quasi-absence of adhesion between graphene and indentor tip. These results open new opportunities regarding tribological issues related to coatings or MEMS applications.
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Hammad, M., Adjizian, J. J., Sacré, C.-H., Huet, B., Charlier, J.-C., Raskin, J.-P., & Pardoen, T. (2017). Adhesionless and near-ideal contact behavior of graphene on Cu thin film. Carbon, 122, 446-450. https://doi.org/10.1016/j.carbon.2017.06.037 (Original work published 2017)