Structure and properties of chemically prepared nanographene islands characterized by scanning tunneling microscopy

Abstract

Single layer graphene islands with a typical diameter of several nanometers were grown on a Pt (111) substrate. Scanning tunneling microscopy (STM) analysis showed most of islands are hexagonally shaped and the zigzag-type edge predominates over the armchair-type edge. The apparent height at the atoms on the zigzag edge is enhanced with respect to the inside atoms for a small sample bias voltage, while such an enhancement was not observed at the atoms on the armchair edge. This result provides an experimental evidence of spatially (at the zigzag edge) and energetically (at the Fermi level) localized edge state in the nanographene islands, which were prepared chemically on Pt (111).

arXiv comment8 pages, 8 figures, 1 table

References in corpus (10)

• Electric Field Effect in Atomically Thin Carbon Films
• Observation of zigzag and armchair edges of graphite using scanning tunneling microscopy and spectroscopy
• Structure, Stability, Edge States and Aromaticity of Graphene Ribbons
• Periodically rippled graphene: growth and spatially resolved electronic structure
• Two Dimensional Ir-Cluster Lattices on Moiré of Graphene with Ir(111)
• Anisotropic Etching and Nanoribbon Formation in Single-Layer Graphene
• Magnetic nanographite
• Scanning tunneling microscopy and spectroscopy of the electronic local density of states of graphite surfaces near monoatomic step edges
• Edge state on hydrogen-terminated graphite edges investigated by scanning tunneling microscopy
• Unit cell of graphene on Ru(0001): a 25 x 25 supercell with 1250 carbon atoms

Cited by in corpus (5)

• Control and Characterization of Individual Grains and Grain Boundaries in Graphene Grown by Chemical Vapor Deposition
• Precisely aligned graphene grown on hexagonal boron nitride by catalyst free chemical vapor deposition
• Direct Imaging of Graphene Edges: Atomic Structure and Electronic Scattering
• Reduction of a Single Layer Graphene Oxide Film on Pt(111)
• Conductive Atomic Force Microscopy of Chemically Synthesized Graphene Oxide and Interlayer Conduction