Atomic Structure of Graphene Subnanometer Pores

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• 作者：Alex W. Robertson ; Gun-Do Lee ; Kuang He ; Chuncheng Gong ; Qu Chen ; Euijoon Yoon ; Angus I. Kirkland ; Jamie H. Warner
• 刊名：ACS Nano
• 出版年：2015
• 出版时间：December 22, 2015
• 年：2015
• 卷：9
• 期：12
• 页码：11599-11607
• 全文大小：860K
• ISSN：1936-086X

文摘

The atomic structure of subnanometer pores in graphene, of interest due to graphene鈥檚 potential as a desalination and gas filtration membrane, is demonstrated by atomic resolution aberration corrected transmission electron microscopy. High temperatures of 500 掳C and over are used to prevent self-healing of the pores, permitting the successful imaging of open pore geometries consisting of between 鈭? to 鈭?3 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.