Large-area Bernal-stacked bi-, tri-, and tetralayer graphene

ACS Nano. 2012 Nov 27;6(11):9790-6. doi: 10.1021/nn303328e. Epub 2012 Nov 7.

Abstract

Few-layer graphene, with Bernal stacking order, is of particular interest to the graphene community because of its unique tunable electronic structure. A synthetic method to produce such large area graphene films with precise thickness from 2 to 4 layers would be ideal for chemists and physicists to explore the promising electronic applications of these materials. Here, large-area uniform Bernal-stacked bi-, tri-, and tetralayer graphene films were successfully synthesized on a Cu surface in selective growth windows, with a finely tuned total pressure and CH(4)/H(2) gas ratio. On the basis of the analyses obtained, the growth mechanism is not an independent homoexpitaxial layer-by-layer growth, but most likely a simultaneous-seeding and self-limiting process.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Copper / chemistry*
  • Crystallization / methods*
  • Graphite / chemistry*
  • Macromolecular Substances / chemistry
  • Materials Testing
  • Membranes, Artificial*
  • Molecular Conformation
  • Nanostructures / chemistry*
  • Nanostructures / ultrastructure*
  • Nanotechnology / methods*
  • Particle Size
  • Surface Properties

Substances

  • Macromolecular Substances
  • Membranes, Artificial
  • Graphite
  • Copper