Toward the use of CVD-grown MoS2 nanosheets as field-emission source

Geetanjali Deokar, Nitul Rajput, Junjie Lie, Francis Leonard Deepak, Wei Ou-Yang, Nicolas Reckinger, Carla Bittencourt, Jean-François Colomer, Mustapha Jouiad

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    Abstract

    Densely populated edge-terminated vertically aligned two-dimensional MoS 2 nanosheets (NSs) with thicknesses ranging from 5 to 20 nm were directly synthesized on Mo films deposited on SiO 2 by sulfurization. The quality of the obtained NSs was analyzed by scanning electron and transmission electron microscopy, and Raman and X-ray photoelectron spectroscopy. The as-grown NSs were then successfully transferred to the substrates using a wet chemical etching method. The transferred NSs sample showed excellent field-emission properties. A low turn-on field of 3.1 V/μm at a current density of 10 μA/cm 2 was measured. The low turnon field is attributed to the morphology of the NSs exhibiting vertically aligned sheets of MoS 2 with sharp and exposed edges. Our findings show that the fabricated MoS 2 NSs could have a great potential as robust high-performance electron-emitter material for various applications such as microelectronics and nanoelectronics, flat-panel displays and electron-microscopy emitter tips.

    Original languageEnglish
    Pages (from-to)1686-1694
    Number of pages9
    JournalBeilstein Journal of Nanotechnology
    Volume9
    Issue number1
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Chemical vapor deposition (CVD)
    • Field emission
    • Molybdenum disulfide (MoS )
    • Nanosheets
    • Sulfurization
    • Transmission electron microscopy (TEM)

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