Universal epitaxy of non-centrosymmetric two-dimensional single-crystal metal dichalcogenides

Peiming Zheng, Wenya Wei, Zhihua Liang, Biao Qin, Jinpeng Tian, Jinhuan Wang, Ruixi Qiao, Yunlong Ren, Junting Chen, Chen Huang, Xu Zhou, Guangyu Zhang, Zhilie Tang, Dapeng Yu, Feng Ding (), Kaihui Liu () and Xiaozhi Xu ()
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Peiming Zheng: South China Normal University
Wenya Wei: South China Normal University
Zhihua Liang: South China Normal University
Biao Qin: Peking University
Jinpeng Tian: Chinese Academy of Sciences
Jinhuan Wang: Peking University
Ruixi Qiao: Peking University
Yunlong Ren: South China Normal University
Junting Chen: South China Normal University
Chen Huang: Peking University
Xu Zhou: South China Normal University
Guangyu Zhang: Chinese Academy of Sciences
Zhilie Tang: South China Normal University
Dapeng Yu: Southern University of Science and Technology
Feng Ding: Chinese Academy of Sciences
Kaihui Liu: Peking University
Xiaozhi Xu: South China Normal University

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract The great challenge for the growth of non-centrosymmetric 2D single crystals is to break the equivalence of antiparallel grains. Even though this pursuit has been partially achieved in boron nitride and transition metal dichalcogenides (TMDs) growth, the key factors that determine the epitaxy of non-centrosymmetric 2D single crystals are still unclear. Here we report a universal methodology for the epitaxy of non-centrosymmetric 2D metal dichalcogenides enabled by accurate time sequence control of the simultaneous formation of grain nuclei and substrate steps. With this methodology, we have demonstrated the epitaxy of unidirectionally aligned MoS2 grains on a, c, m, n, r and v plane Al2O3 as well as MgO and TiO2 substrates. This approach is also applicable to many TMDs, such as WS2, NbS2, MoSe2, WSe2 and NbSe2. This study reveals a robust mechanism for the growth of various 2D single crystals and thus paves the way for their potential applications.

Date: 2023
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DOI: 10.1038/s41467-023-36286-6

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