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

Mayu Yamamoto, Seiji Obata, Koichiro Saiki

Research output: Contribution to journalArticle

22 Citations (Scopus)

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).

Original languageEnglish
Pages (from-to)1637-1641
Number of pages5
JournalSurface and Interface Analysis
Volume42
Issue number10-11
DOIs
Publication statusPublished - Oct 1 2010
Externally publishedYes

Keywords

  • Chemical vapor deposition
  • Edge state
  • Graphene
  • Scanning tunneling microscopy
  • Zigzag edge

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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