Softened elastic response and unzipping in chemical vapor deposition graphene membranes
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. © 2011 American Chemical Society.
Date Published
Journal
Nano Letters
Volume
11
Issue
6
Number of Pages
2259-2263,
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-79958848285&doi=10.1021%2fnl200429f&partnerID=40&md5=6af38b385e6b432dfd07b6137fa16c73
DOI
10.1021/nl200429f
Research Area
Group (Lab)
Paul McEuen Group