Atomic characterization of monolayer doped graphene sheets synthesized by chemical vapor deposition

ORAL

Abstract

Large-area, high-quality monolayer nitrogen (or boron)-doped graphene sheets were synthesized on copper foils by a modified chemical vapor deposition (CVD) apparatus. As-grown graphene sheets could be easily transferred from copper foils onto different substrates (e.g. silicon/silicon dioxide wafers). Compared with pristine graphene, nitrogen (or boron)-doped graphene shows strong D-band caused by doping and structural defects formed within the lattice. Scanning tunneling microscopy (STM) and spectroscopy (STS) reveal that the defects in the doped graphene samples arrange in different geometrical configurations. The localized states in the valence and conduction bands are in accordance with the type of dopant and bonding type. These experimental results are in agreement with first principles calculations of LDOS of doped graphene and STM image simulations.

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Authors

  • R.T. Lu

    • Department of Physics, The Pennsylvania State University, USA

  • Qing Li

    • Oak Ridge National Laboratory
    • Center for Nanophase Materials Sciences Division, Oak Ridge National Laboratory, USA
    • Center of Nanophase Materials Sciences, Oak Ridge National Laboratory, TN, USA 37831

  • Andr\'es Rafael Botello-M\'endez

    • ICMN, Universit\'e Catholique de Louvain, Belgium
    • Universit\'e Catholique de Louvain
    • Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Belgium
    • Institute of Condensed Matter and Nanosciences(IMCN), Universite Catholique de Louvain (UCL), Belgium

  • J.C. Charlier

    • ICMN, Universit\'e Catholique de Louvain, Belgium
    • Universit\'e Catholique de Louvain
    • Institute of Condensed Matter and Nanosciences, Universit\'e Catholique de Louvain, Belgium

  • B. Wang

    • Department of Physics, Penn State University
    • Department of Physics, The Pennsylvania State University, USA

  • A. Berkdemir

    • Department of Physics, The Pennsylvania State University, USA

  • Humberto R. Gutierrez

    • The Pennsylvania State University, U.S.A.
    • Department of Physics, The Pennsylvania State University, USA
    • PSU

  • J. Zhu

    • Department of Physics, Penn State University
    • Department of Physics, The Pennsylvania State University, USA

  • Humberto Terrones

    • Department of Physics, The Pennsylvania State University, USA
    • PSU

  • Minghu Pan

    • Oak Ridge National Laboratory
    • Center for Nanophase Materials Sciences Division, Oak Ridge National Laboratory, USA
    • Center of Nanophase Materials Sciences, Oak Ridge National Laboratory, TN, USA 37831

  • Mauricio Terrones

    • The Pennsylvania State University, U.S.A.
    • Department of Physics, The Pennsylvania State University, USA; Research Center for Exotic Nanocarbons, Shinshu University, Japan
    • PSU, Shinshu University
    • The Pennsylvania State University