• 文献标题:   Yield and Shape Selection of Graphene Nanoislands Grown on Ni(111)
  • 文献类型:   Article
  • 作  者:   OLLE M, CEBALLOS G, SERRATE D, GAMBARDELLA P
  • 作者关键词:   graphene, ni 111, selfassembly, scanning tunneling microscopy
  • 出版物名称:   NANO LETTERS
  • ISSN:   1530-6984 EI 1530-6992
  • 通讯作者地址:   Catalan Inst Nanotechnol ICN
  • 被引频次:   30
  • DOI:   10.1021/nl300897m
  • 出版年:   2012

▎ 摘  要

The catalytic decomposition of hydrocarbons on transition-metal surfaces has attracted increasing interest as a method to prepare high quality graphene layers. Here, we study the optimal reaction path for the preparation of graphene nanoislands of selected shape using controlled decomposition of propene on Ni(111). Scanning tunneling microscopy performed at different stages of the reaction provides insight into the temperature and dose-dependent growth of graphene islands, which precedes the formation of monolayer graphene. The effect of postreaction annealing on the morphology of the islands is studied. By adjusting the initial propene dose, reaction temperature, and postannealing procedure, islands with a triangular or hexagonal shape can be selectively obtained.