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Enhanced Field-Emission Behavior of Layered MoS2 Sheets

Authors

  • Ranjit V. Kashid,

    1. Center for Advanced Studies in Material Science and Condensed Matter Physics, Department of Physics, University of Pune, Pune 411007, India
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  • Dattatray J. Late,

    1. Department of Materials Science and Engineering, International Institute of Nanotechnology, Northwestern University, Evanston, Illinois 60208, USA
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  • Stanley S. Chou,

    1. Department of Materials Science and Engineering, International Institute of Nanotechnology, Northwestern University, Evanston, Illinois 60208, USA
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  • Yi-Kai Huang,

    1. Department of Materials Science and Engineering, International Institute of Nanotechnology, Northwestern University, Evanston, Illinois 60208, USA
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  • Mrinmoy De,

    1. Department of Materials Science and Engineering, International Institute of Nanotechnology, Northwestern University, Evanston, Illinois 60208, USA
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  • Dilip S. Joag,

    1. Center for Advanced Studies in Material Science and Condensed Matter Physics, Department of Physics, University of Pune, Pune 411007, India
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  • Mahendra A. More,

    Corresponding author
    1. Center for Advanced Studies in Material Science and Condensed Matter Physics, Department of Physics, University of Pune, Pune 411007, India
    • Center for Advanced Studies in Material Science and Condensed Matter Physics, Department of Physics, University of Pune, Pune 411007, India.
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  • Vinayak P. Dravid

    Corresponding author
    1. Department of Materials Science and Engineering, International Institute of Nanotechnology, Northwestern University, Evanston, Illinois 60208, USA
    • Department of Materials Science and Engineering, International Institute of Nanotechnology, Northwestern University, Evanston, Illinois 60208, USA
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Abstract

Field emission studies are reported for the first time on layered MoS2 sheets at the base pressure of ∼1 × 10−8 mbar. The turn-on field required to draw a field emission current density of 10 μA/cm2 is found to be 3.5 V/μm for MoS2 sheets. The turn-on values are found to be significantly lower than the reported MoS2 nanoflowers, graphene, and carbon nanotube-based field emitters due to the high field enhancement factor (∼1138) associated with nanometric sharp edges of MoS2 sheet emitter surface. The emission current–time plots show good stability over a period of 3 h. Owing to the low turn-on field and planar (sheetlike) structure, the MoS2 could be utilized for future vacuum microelectronics/nanoelectronic and flat panel display applications.

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