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- W2022151845 abstract "Transition-metal dichalcogenides like molybdenum disulphide have attracted great interest as two-dimensional materials beyond graphene due to their unique electronic and optical properties. Solution-phase processes can be a viable method for producing printable single-layer chalcogenides. Molybdenum disulphide can be exfoliated into monolayer flakes using organolithium reduction chemistry; unfortunately, the method is hampered by low yield, submicron flake size and long lithiation time. Here we report a high-yield exfoliation process using lithium, potassium and sodium naphthalenide where an intermediate ternary LixMXn crystalline phase (X=selenium, sulphur, and so on) is produced. Using a two-step expansion and intercalation method, we produce high-quality single-layer molybdenum disulphide sheets with unprecedentedly large flake size, that is up to 400 μm2. Single-layer dichalcogenide inks prepared by this method may be directly inkjet-printed on a wide range of substrates. Molybdenum disulphide may be prepared by lithiation and exfoliation; however the process requires a long lithiation and produces low yields. Here, the authors show that metal naphthalenides may be used for the intercalation, and that the resulting products are of high quality and may be inkjet-printed." @default.
- W2022151845 created "2016-06-24" @default.
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- W2022151845 date "2014-01-02" @default.
- W2022151845 modified "2023-10-16" @default.
- W2022151845 title "High yield exfoliation of two-dimensional chalcogenides using sodium naphthalenide" @default.
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- W2022151845 doi "https://doi.org/10.1038/ncomms3995" @default.
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