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Issue 27, 2015
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Controlled formation of closed-edge nanopores in graphene

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Dangling bonds at the edge of a nanopore in monolayer graphene make it susceptible to back-filling at low temperatures from atmospheric hydrocarbons, leading to potential instability for nanopore applications, such as DNA sequencing. We show that closed edge nanopores in bilayer graphene are robust to back-filling under atmospheric conditions for days. A controlled method for closed edge nanopore formation starting from monolayer graphene is reported using an in situ heating holder and electron beam irradiation within an aberration-corrected transmission electron microscopy. Tailoring of closed-edge nanopore sizes is demonstrated from 1.4–7.4 nm. These results should provide mechanisms for improving the stability of nanopores in graphene for a wide range of applications involving mass transport.

Graphical abstract: Controlled formation of closed-edge nanopores in graphene

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The article was received on 09 Apr 2015, accepted on 10 Jun 2015 and first published on 19 Jun 2015

Article type: Paper
DOI: 10.1039/C5NR02277K
Nanoscale, 2015,7, 11602-11610

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    Controlled formation of closed-edge nanopores in graphene

    K. He, A. W. Robertson, C. Gong, C. S. Allen, Q. Xu, H. Zandbergen, J. C. Grossman, A. I. Kirkland and J. H. Warner, Nanoscale, 2015, 7, 11602
    DOI: 10.1039/C5NR02277K

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