A library of atomically thin metal chalcogenides
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....
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/84198 http://hdl.handle.net/10220/50185 |
| _version_ | 1826125210627080192 |
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| author | 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 |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering 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 |
| author_sort | Zhou, Jiadong |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T06:32:59Z |
| format | Journal Article |
| id | ntu-10356/84198 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:32:59Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/841982023-07-14T15:55:22Z A library of atomically thin metal chalcogenides 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 School of Electrical and Electronic Engineering School of Materials Science & Engineering School of Physical and Mathematical Sciences Centre for Micro-/Nano-electronics (NOVITAS) Environmental Chemistry and Materials Centre Center for Programmable Materials Nanyang Environment and Water Research Institute Electronic Devices Synthesis And Processing Science::Physics 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. NRF (Natl Research Foundation, S’pore) ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Accepted version 2019-10-17T03:03:44Z 2019-12-06T15:40:21Z 2019-10-17T03:03:44Z 2019-12-06T15:40:21Z 2018 Journal Article 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 0028-0836 https://hdl.handle.net/10356/84198 http://hdl.handle.net/10220/50185 10.1038/s41586-018-0008-3 en Nature © 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. 18 p. application/pdf |
| spellingShingle | Electronic Devices Synthesis And Processing Science::Physics 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 A library of atomically thin metal chalcogenides |
| title | A library of atomically thin metal chalcogenides |
| title_full | A library of atomically thin metal chalcogenides |
| title_fullStr | A library of atomically thin metal chalcogenides |
| title_full_unstemmed | A library of atomically thin metal chalcogenides |
| title_short | A library of atomically thin metal chalcogenides |
| title_sort | library of atomically thin metal chalcogenides |
| topic | Electronic Devices Synthesis And Processing Science::Physics |
| url | https://hdl.handle.net/10356/84198 http://hdl.handle.net/10220/50185 |
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