Softened Elastic Response and Unzipping in Chemical Vapor Deposition Graphene Membranes
Nano Letters2011Vol. 11(6), pp. 2259–2263
Citations Over TimeTop 1% of 2011 papers
Carlos Ruiz‐Vargas, Houlong Zhuang, Pinshane Y. Huang, Arend M. van der Zande, Shivank Garg, Paul L. McEuen, David A. Muller, Richard G. Hennig, Jiwoong Park
Abstract
We use atomic force microscopy to image grain boundaries and ripples in graphene membranes obtained by chemical vapor deposition. Nanoindentation measurements reveal that out-of-plane ripples effectively soften graphene's in-plane stiffness. Furthermore, grain boundaries significantly decrease the breaking strength of these membranes. Molecular dynamics simulations reveal that grain boundaries are especially weakening when subnanometer voids are present in the lattice. Finally, we demonstrate that two graphene membranes brought together form membranes with higher resistance to breaking.
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