• 文献标题:   Atomic-Scale Investigation of Graphene Grown on Cu Foil and the Effects of Thermal Annealing
  • 文献类型:   Article
  • 作  者:   CHO J, GAO L, TIAN JF, CAO HL, WU W, YU QK, YITAMBEN EN, FISHER B, GUEST JR, CHEN YP, GUISINGER NP
  • 作者关键词:   graphene, chemical vapor deposition, cu foil, scanning tunneling microscopy, moire pattern, corrosion, surface oxide
  • 出版物名称:   ACS NANO
  • ISSN:   1936-0851
  • 通讯作者地址:   Argonne Natl Lab
  • 被引频次:   111
  • DOI:   10.1021/nn103338g
  • 出版年:   2011

▎ 摘  要

We have investigated the effects of thermal annealing on ex-situ chemically vapor deposited submonolayer graphene islands on polycrystalline Cu foil at the atomic-scale using ultrahigh vacuum scanning tunneling microscopy. Low-temperature annealed graphene islands on Cu foil (at similar to 430 degrees C) exhibit predominantly striped Moire patterns, indicating a relatively weak interaction between graphene and the underlying polycrystalline Cu foil. Rapid high-temperature annealing of the simple (at 700-800 degrees C) gives rise to the removal of Cu oxide and the recovery of crystallographic features of the copper that surrounds the intact graphene. These experimental observations of continuous crystalline features between the underlying copper (beneath the graphene islands). and the surrounding exposed copper areas revealed by high-temperature annealing demonstrates the impenetrable nature of graphene and its potential application as a protective layer against corrosion.