Determination of the Bending Rigidity of Graphene via Electrostatic Actuation of Buckled Membranes
Artikel i vetenskaplig tidskrift, 2012

Classical continuum mechanics is used extensively to predict the properties of nanoscale materials such as graphene. The bending rigidity, kappa, is an important parameter that is used, for example, to predict the performance of graphene nanoelectromechanical devices and also ripple formation. Despite its importance, there is a large spread in the theoretical predictions of kappa for few-layer graphene. We have used the snap-through behavior of convex buckled graphene membranes under the application of electrostatic pressure to determine experimentally values of kappa for double-layer graphene membranes. We demonstrate how to prepare convex-buckled suspended graphene ribbons and fully clamped suspended membranes and show how the determination of the curvature of the membranes and the critical snap-through voltage, using AFM, allows us to extract kappa. The bending rigidity of bilayer graphene membranes under ambient conditions was determined to be 35.5(-15.0)(+20.0) eV. Monolayers are shown to have significantly lower kappa than bilayers.

bending rigidity

Few-layer graphene

sheets

buckled membranes

Författare

Niklas Lindahl

Göteborgs universitet

Daniel Midtvedt

Chalmers, Teknisk fysik, Kondenserade materiens teori

Johannes Svensson

Lunds Universitet

O. A. Nerushev

University of Edinburgh

Niclas Lindvall

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Andreas Isacsson

Chalmers, Teknisk fysik, Kondenserade materiens teori

Eleanor E B Campbell

University of Edinburgh

Konkuk University

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 12 3526-3531

Ämneskategorier

Fysik

DOI

10.1021/nl301080v