• 文献标题:   Aviram-Ratner rectifying mechanism for DNA base-pair sequencing through graphene nanogaps
  • 文献类型:   Article
  • 作  者:   AGAPITO LA, GAYLES J, WOLOWIEC C, KIOUSSIS N
  • 作者关键词:  
  • 出版物名称:   NANOTECHNOLOGY
  • ISSN:   0957-4484
  • 通讯作者地址:   Calif State Univ Northridge
  • 被引频次:   6
  • DOI:   10.1088/0957-4484/23/13/135202
  • 出版年:   2012

▎ 摘  要

We demonstrate that biological molecules such as Watson-Crick DNA base pairs can behave as biological Aviram-Ratner electrical rectifiers because of the spatial separation and weak hydrogen bonding between the nucleobases. We have performed a parallel computational implementation of the ab initio non-equilibrium Green's function (NEGF) theory to determine the electrical response of graphene-base-pair-graphene junctions. The results show an asymmetric (rectifying) current-voltage response for the cytosine-guanine base pair adsorbed on a graphene nanogap. In sharp contrast we find a symmetric response for the thymine-adenine case. We propose applying the asymmetry of the current-voltage response as a sensing criterion to the technological challenge of rapid DNA sequencing via graphene nanogaps.