Wednesday, September 26, 2012

1209.5389 (Till J. W. Wagner et al.)

The sensitivity of Graphene 'Snap-through' to substrate geometry    [PDF]

Till J. W. Wagner, Dominic Vella
We study theoretically the deposition of Few Layer Graphene sheets onto a grooved substrate incorporating adhesion between substrate and sheet. We develop a model to understand the equilibrium of the sheet allowing for partial conformation of sheet to substrate. This model gives new insight into recent observations of 'snap-through' from flat to conforming states and emphasizes the crucial role of substrate shape in determining the nature of this transition. Our analytical results are consistent with numerical simulations using a van der Waals-like interaction . Finally we propose a novel substrate shape that should exhibit a continuous, rather than 'snap-through', transition.
View original: http://arxiv.org/abs/1209.5389

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