• 文献标题:   Carbon nanotube-graphene junctions studied by impedance spectra
  • 文献类型:   Article
  • 作  者:   GAO M, HUANG ZL, ZENG B, PAN TS, ZHANG Y, PENG HB, LIN Y
  • 作者关键词:  
  • 出版物名称:   APPLIED PHYSICS LETTERS
  • ISSN:   0003-6951 EI 1077-3118
  • 通讯作者地址:   Univ Elect Sci Technol China
  • 被引频次:   6
  • DOI:   10.1063/1.4907642
  • 出版年:   2015

▎ 摘  要

Two kinds of carbon nanotube (CNT)-graphene structures, vertical CNT-graphene and paralleled CNT-graphene, were fabricated to investigate the geometrical effect on the transport properties of the CNT-graphene junctions by using AC impedance spectra. The results demonstrated that the geometrical structure showed obvious impact on the resistance rather than the capacity of the junction. It is proposed that the difference caused by the geometrical structure may be associated with the dangling bonds terminated by -OH or -COOH of the open-ended CNTs. The unsymmetrical chemical bonds will increase the dipole moment in CNTs, which enhance the interaction between vertical CNTs and graphene and reduce the contact resistance. (C) 2015 AIP Publishing LLC.