Spectro-microscopy of single and multi-layer graphene supported by a   weakly interacting substrate
  We report measurements of the electronic structure and surface morphology of exfoliated graphene on an insulating substrate using angle-resolved photoemission and low energy electron diffraction. Our results show that although exfoliated graphene is microscopically corrugated, the valence band retains a massless fermionic dispersion, with a Fermi velocity of ~10^6 m/s. We observe a close relationship between the morphology and electronic structure, which suggests that controlling the interaction between graphene and the supporting substrate is essential for graphene device applications. 
Kevin R. Knox, Shancai Wang, Alberto Morgante, Dean Cvetko, Andrea   Locatelli, Tevfik Onur Mentes, Miguel Angel Ni\~no, Phi...