Session P37: Focus Session: Graphene Structure, Dopants, and Defects: Strain Engineering II
8:00 AM–11:00 AM, Wednesday, March 23, 2011
Room: C146
Sponsoring Unit:
DMP
Chair: Michael Crommie, University of California, Berkeley
Abstract ID: BAPS.2011.MAR.P37.6
Abstract: P37.00006 : Snap-through instability of graphene on corrugated substrates
9:24 AM–9:36 AM
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Abstract 
Authors:
Cesar Chialvo
(University of Illinois at Urbana Champaign)
Scott Scharfenberg
(University of Illinois at Urbana Champaign)
Nikhita Mansukhani
(University of Illinois at Urbana Champaign)
Richard Weaver
(University of Illinois at Urbana Champaign)
Nadya Mason
(University of Illinois at Urbana Champaign)
We discuss atomic force microscopy measurements of the interplay between interfacial bonding energy and strain energy in few-layer-graphene (FLG) placed on micro-scale corrugated metallic substrates. For fixed corrugation amplitude and wavelength, the theoretical strain energy of conformed FLG scales with the third power of its thickness. We present evidence of a so-called ``snap-through instability,'' where the behavior of the FLG abruptly changes, as a function of thickness, from fully conformed, to completely detached. The large FLG thickness, and by implication strain energy, at the snap-through point implies that the FLG-substrate bonding is larger than expected for van der Waals forces.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.P37.6