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Abstract We report the electronic structure of the Au-intercalated graphene/Ni(111) surface using angle-resolved photoemission spectroscopy and low energy electron diffraction. The graphene/Ni(111) shows no Dirac cone near the Fermi level and a relatively broad C 1s core level spectrum probably due to the broken sublattice symmetry in the graphene on the Ni(111) substrate. When Au atoms are intercalated between them, the characteristic Dirac cone is completely recovered near the Fermi level and the C 1s spectrum becomes sharper with the appearance of a 10 × 10 superstructure. The fully Au-intercalated graphene/Ni(111) surface shows a p-type character with a hole pocket of ∼0.034 Å−1 diameter at the Fermi level. When the surface is doped with Na and K, a clear energy gap of ∼0.4 eV is visible irrespective of alkali metal. [ABSTRACT FROM AUTHOR]

Abstract: Ideal undisturbed functionalized epitaxial graphene on SiC was examined by angle resolved photoemission spectroscopy, scanning photoemission microscopy and atomic force microscope. The surface was prepared by non-covalently attaching tetra(4-carboxyphenyl)-porphine(TCPP) on the surface. This material performs well as a chemically very sensitive and thermally very stable template. The adsorbed TCPP layer does not disturb the intrinsic physical properties of the graphene. A patterned Al2O3 layer can be easily produced by preparing a pre-patterned TCPP on the graphene surface. [Copyright &y& Elsevier]

Abstract: Adsorption and desorption of fullerene on a single layer of graphene grown on SiC(0001) were investigated by photoemission spectroscopy (PES). No significant change in the band structure of graphene was observed after fullerene deposition on the graphene layer under vacuum conditions, and subsequent exposure to the air. After annealing the fullerene layer at 275°C in a vacuum, complete desorption of fullerene was observed without any resulting damage to the graphene structure. The desorption temperature of fullerene was significantly higher than that of pentacene, indicating that fullerene layers show higher stability than pentacene as protection layers of graphene-based devices. [Copyright &y& Elsevier]