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Title: A library of atomically thin metal chalcogenides
Authors: Zhou, Jiadong
Lin, Junhao
Huang, Xiangwei
Zhou, Yao
Chen, Yu
Xia, Juan
Wang, Hong
Xie, Yu
Yu, Huimei
Lei, Jincheng
Wu, Di
Liu, Fucai
Fu, Qundong
Zeng, Qingsheng
Hsu, Chuang-Han
Yang, Changli
Lu, Li
Yu, Ting
Shen, Zexiang
Lin, Hsin
Yakobson, Boris I.
Liu, Qian
Suenaga, Kazu
Liu, Guangtong
Liu, Zheng
Keywords: Electronic Devices
Synthesis And Processing
Issue Date: 2018
Source: Zhou, J., Lin, J., Huang, X., Zhou, Y., Chen, Y., Xia, J., . . . Liu, Z. (2018). A library of atomically thin metal chalcogenides. Nature, 556(7701), 355-359. doi:10.1038/s41586-018-0008-3
Series/Report no.: Nature
Abstract: Investigations of two-dimensional transition-metal chalcogenides (TMCs) have recently revealed interesting physical phenomena, including the quantum spin Hall effect1,2, valley polarization3,4 and two-dimensional superconductivity5, suggesting potential applications for functional devices6,7,8,9,10. However, of the numerous compounds available, only a handful, such as Mo- and W-based TMCs, have been synthesized, typically via sulfurization11,12,13,14,15, selenization16,17 and tellurization18 of metals and metal compounds. Many TMCs are difficult to produce because of the high melting points of their metal and metal oxide precursors. Molten-salt-assisted methods have been used to produce ceramic powders at relatively low temperature19 and this approach20 was recently employed to facilitate the growth of monolayer WS2 and WSe2. Here we demonstrate that molten-salt-assisted chemical vapour deposition can be broadly applied for the synthesis of a wide variety of two-dimensional (atomically thin) TMCs. We synthesized 47 compounds, including 32 binary compounds (based on the transition metals Ti, Zr, Hf, V, Nb, Ta, Mo, W, Re, Pt, Pd and Fe), 13 alloys (including 11 ternary, one quaternary and one quinary), and two heterostructured compounds. We elaborate how the salt decreases the melting point of the reactants and facilitates the formation of intermediate products, increasing the overall reaction rate. Most of the synthesized materials in our library are useful, as supported by evidence of superconductivity in our monolayer NbSe2 and MoTe2 samples21,22 and of high mobilities in MoS2 and ReS2. Although the quality of some of the materials still requires development, our work opens up opportunities for studying the properties and potential application of a wide variety of two-dimensional TMCs.
ISSN: 0028-0836
DOI: 10.1038/s41586-018-0008-3
Rights: © 2018 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. This paper was published in Nature and is made available with permission of Macmillan Publishers Limited, part of Springer Nature.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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