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Single crystals of the layered dichalcogenides MoS2 and WS2 grown by liquid phase transport

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arxiv 1906.06769 v2 pith:QUCRTQBD submitted 2019-06-16 cond-mat.mtrl-sci

F. Alex Cevallos , Shu Guo , Hoseok Heo , Giovanni Scuri , You Zhou , Jiho Sung , Takashi Taniguchi , Kenji Watanabe
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Philip Kim Hongkun Park Robert J. Cava
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classification cond-mat.mtrl-sci
keywords crystalsmos2singlegrownintergrowthsliquidtransportcharacterized
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The growth of single crystals of MoS2 and WS2 by materials transport through a liquid salt flux made from a low melting mixture of NaCl and CsCl is described. The crystals are characterized by single crystal X-ray diffraction, which reveals that they are 2H-MoS2 with a small percentage (about 3%) of 3R intergrowths. The 2H-WS2 crystals display less than 1% of 3R intergrowths. Photoluminescence spectra of exfoliated monolayers suggest that MoS2 grown by this method has superior crystallinity in comparison to commercially-available MoS2 crystals.

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