Synthesis and characterization of MoS2 nanosheets

Geetanjali Deokar, D. Vignaud, R. Arenal, Pierre Louette, Jean-François Colomer

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Here, we report on the synthesis of MoS2 nanosheets using a simple two-step additive-free growth technique. The as-synthesized nanosheets were characterized to determine their structure and composition, as well as their optical properties. The MoS2 nanosheets were analyzed by scanning electron microscopy, transmission electron microscopy (TEM), including high-resolution scanning TEM imaging and energy-dispersive x-ray spectroscopy, x-ray photoelectron spectroscopy (XPS), Raman spectroscopy and photoluminescence (PL). The as-produced MoS2 nanosheets are vertically aligned with curved edges and are densely populated. The TEM measurements confirmed that the nanosheets have the 2H-MoS2 crystal structure in agreement with the Raman results. The XPS results revealed the presence of high purity MoS2. Moreover, a prominent PL similar to mechanically exfoliated few and mono-layer MoS2 was observed for the as-grown nanosheets. For the thin (≤50 nm) nanosheets, the PL feature was observed at the same energy as that for a direct band-gap monolayer MoS2 (1.83 eV). Thus, the as-produced high-quality, large-area, MoS2 nanosheets could be potentially useful for various optoelectronic and catalysis applications.

    Original languageEnglish
    Article number075604
    Number of pages10
    JournalNanotechnology
    Volume27
    Issue number7
    DOIs
    Publication statusPublished - 2016

    Keywords

    • MoS
    • nanosheets
    • photoluminescence
    • TEM
    • vapour-solid reactions

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