• 文献标题:   Preparation and characterization of graphene and few-layer graphene
  • 文献类型:   Article
  • 作  者:   FENG Y, HUANG SH, KANG K, DUAN XX
  • 作者关键词:   graphene, hopg, micromechanical cleavage, cvd
  • 出版物名称:   NEW CARBON MATERIALS
  • ISSN:   1007-8827 EI 1872-5805
  • 通讯作者地址:   Beijing Jiaotong Univ
  • 被引频次:   14
  • DOI:  
  • 出版年:   2011

▎ 摘  要

Few-layer graphene was prepared from highly oriented pyrolytic graphite by micromechanical cleavage and transferred to the silicaon coated with silicon dioxide (SiO2/Si). The thickness of graphene on the SiO2/Si support was investigated by color and contrast variations under an optical microscope. Atomic force microscopy and Raman spectroscopy were used to determine the number of layers. Results show that a monolayer, double layers and multiple layers of graphene were prepared. The optical microscope images can give a satisfactory identification of the graphene thickness on SiO2/Si. In the Raman spectrum the 2D band is narrower and G band is weaker for double layers than that for multiple layers. Chemical vapor deposition was also used to grow large area (similar to cm(2)) graphene. However, micromechanical cleavage is a more simple method to prepare graphene.