• 文献标题:   Atomic Structure of Graphene Subnanometer Pores
  • 文献类型:   Article
  • 作  者:   ROBERTSON AW, LEE GD, HE K, GONG CC, CHEN Q, YOON E, KIRKLAND AI, WARNER JH
  • 作者关键词:   graphene, hrtem, electron microscopy, defect, tem, nanopore, filter
  • 出版物名称:   ACS NANO
  • ISSN:   1936-0851 EI 1936-086X
  • 通讯作者地址:   Univ Oxford
  • 被引频次:   24
  • DOI:   10.1021/acsnano.5b05700
  • 出版年:   2015

▎ 摘  要

The atomic structure of subnanometer pores in graphene, of interest due to graphene's potential as a desalination and gas filtration membrane, is demonstrated by atomic resolution aberration corrected transmission electron microscopy. High temperatures of 500 degrees C and over are used to prevent self-healing of the pores, permitting the successful imaging of open pore geometries consisting of between -4 to -13 atoms, all exhibiting subnanometer diameters. Picometer resolution bond length measurements are used to confirm reconstruction of five-membered ring projections that often decorate the pore perimeter, knowledge which is used to explore the viability of completely self-passivated subnanometer pore structures; bonding configurations where the pore would not require external passivation by, for example, hydrogen to be chemically inert.