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Determination of the Bending Rigidity of Graphene via Electrostatic Actuation of Buckled Membranes

Författare:
  • Niklas Lindahl
  • Daniel Midtvedt
  • Johannes Svensson
  • Oleg A. Nerushev
  • Niclas Lindvall
  • Andreas Isacsson
  • Eleanor E. B. Campbell
Publiceringsår: 2012
Språk: Engelska
Sidor: 3526-3531
Publikation/Tidskrift/Serie: Nano Letters
Volym: 12
Nummer: 7
Dokumenttyp: Artikel
Förlag: American Chemical Society

Sammanfattning

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.

Disputation

Nyckelord

  • Technology and Engineering
  • Few-layer graphene
  • bending rigidity
  • buckled membranes

Övriga

Published
Yes
  • ISSN: 1530-6984

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