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Atomically perfect torn graphene edges and their reversible reconstruction

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  • Kwanpyo Kim

    (University of California at Berkeley, Lawrence Berkeley National Laboratory
    Present address: Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA)

  • Sinisa Coh

    (University of California at Berkeley, Lawrence Berkeley National Laboratory)

  • C Kisielowski

    (National Center for Electron Microscopy, Lawrence Berkeley National Laboratory)

  • M. F. Crommie

    (University of California at Berkeley, Lawrence Berkeley National Laboratory)

  • Steven G. Louie

    (University of California at Berkeley, Lawrence Berkeley National Laboratory)

  • Marvin L. Cohen

    (University of California at Berkeley, Lawrence Berkeley National Laboratory)

  • A. Zettl

    (University of California at Berkeley, Lawrence Berkeley National Laboratory)

Abstract

The atomic structure of graphene edges is critical in determining the electrical, magnetic and chemical properties of truncated graphene structures, notably nanoribbons. Unfortunately, graphene edges are typically far from ideal and suffer from atomic-scale defects, structural distortion and unintended chemical functionalization, leading to unpredictable properties. Here we report that graphene edges fabricated by electron beam-initiated mechanical rupture or tearing in high vacuum are clean and largely atomically perfect, oriented in either the armchair or zigzag direction. We demonstrate, via aberration-corrected transmission electron microscopy, reversible and extended pentagon–heptagon (5–7) reconstruction at zigzag edges, and explore experimentally and theoretically the dynamics of the transitions between configuration states. Good theoretical-experimental agreement is found for the flipping rates between 5–7 and 6–6 zigzag edge states. Our study demonstrates that simple ripping is remarkably effective in producing atomically clean, ideal terminations, thus providing a valuable tool for realizing atomically tailored graphene and facilitating meaningful experimental study.

Suggested Citation

  • Kwanpyo Kim & Sinisa Coh & C Kisielowski & M. F. Crommie & Steven G. Louie & Marvin L. Cohen & A. Zettl, 2013. "Atomically perfect torn graphene edges and their reversible reconstruction," Nature Communications, Nature, vol. 4(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3723
    DOI: 10.1038/ncomms3723
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    Cited by:

    1. Wenjun Cui & Weixiao Lin & Weichao Lu & Chengshan Liu & Zhixiao Gao & Hao Ma & Wen Zhao & Gustaaf Tendeloo & Wenyu Zhao & Qingjie Zhang & Xiahan Sang, 2023. "Direct observation of cation diffusion driven surface reconstruction at van der Waals gaps," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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