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

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

2010-06-14

arxiv.org/abs/1006.2654v1

Surf. Interface Anal., 42, 1637 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 8 figures, 1 table

Scientific paper

10.1002/sia.3583

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).

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