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

被引：22
作者：
Yamamoto, Mayu [1 ]
Obata, Seiji [1 ]
Saiki, Koichiro [1 ]
机构：
[1] Univ Tokyo, Dept Complex Sci & Engn, Chiba 2778561, Japan
来源：
SURFACE AND INTERFACE ANALYSIS | 2010年 / 42卷 / 10-11期
关键词：
graphene; chemical vapor deposition; zigzag edge; edge state; scanning tunneling microscopy; GRAPHITE; GRAPHENE; NI(111); SURFACE; PT(111); LAYERS; EDGE;
D O I：
10.1002/sia.3583
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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). Copyright (C) 2010 John Wiley & Sons, Ltd.
引用
收藏
页码：1637 / 1641
页数：5
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