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Identification of active atomic defects in a monolayered tungsten disulphide nanoribbon

Author

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  • Zheng Liu

    (Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST))

  • Kazu Suenaga

    (Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST))

  • Zhiyong Wang

    (Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University)

  • Zujin Shi

    (Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University)

  • Eiji Okunishi

    (JEOL Ltd)

  • Sumio Iijima

    (Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST))

Abstract

Edge structures and atomic defects can significantly affect the physical and chemical properties of low-dimensional materials, such as nanoribbons, and therefore merit a thorough investigation at the atomic scale. Here, we successfully discriminate single atoms on a monolayered tungsten disulphide nanoribbon by means of time-resolved annular dark-field imaging and spatially resolved electron energy-loss spectroscopy. We unambiguously identify and successfully visualize in motion atomic defects, such as vacancies and edge atoms, using scanning transmission electron microscopy. We also report a direct observation of slip deformation in the nanoribbons and present evidence demonstrating that the deformation process involves the migration of vacancies and rearrangement of tungsten atoms. Single-atom defects are successfully observed for the first time during plastic deformation.

Suggested Citation

  • Zheng Liu & Kazu Suenaga & Zhiyong Wang & Zujin Shi & Eiji Okunishi & Sumio Iijima, 2011. "Identification of active atomic defects in a monolayered tungsten disulphide nanoribbon," Nature Communications, Nature, vol. 2(1), pages 1-5, September.
    • Handle: RePEc:nat:natcom:v:2:y:2011:i:1:d:10.1038_ncomms1224
    DOI: 10.1038/ncomms1224
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