• 文献标题:   The production of large bilayer hexagonal graphene domains by a two-step growth process of segregation and surface-catalytic chemical vapor deposition
  • 文献类型:   Article
  • 作  者:   BI H, HUANG FQ, ZHAO W, LU XJ, CHEN J, LIN TQ, WAN DY, XIE XM, JIANG MH
  • 作者关键词:  
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   25
  • DOI:   10.1016/j.carbon.2012.02.027
  • 出版年:   2012

▎ 摘  要

A novel two-step process combining surface catalyzed process with segregation growth was used to prepare single crystal hexagonal bilayer graphene domains on Cu metal substrates by ambient pressure chemical vapor deposition. Carbon atoms are first dissolved into the quasi-melting Cu metal at 1080 degrees C and then segregated on the Cu surface to form nucleation centers of single-layer graphene during cooling. The graphene crystallites spontaneously act as templates to induce the carbon atoms to form hexagonal bilayer graphene domains. The bilayer graphene domains are size-tunable by controlling the growth conditions. The yield of the bilayer graphene is over 90% and the defect-free domains reach similar to 100 mu m in size, greater than the reported single-layer domains. (C) 2012 Elsevier Ltd. All rights reserved.