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Using graphene to suppress the selenization of Pt for controllable fabrication of monolayer PtSe2

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Abstract

Platinum diselenide (PtSe2) is a promising transition metal dichalcogenide (TMDC) material with unique properties. It is necessary to find a controllable fabrication method to bridge PtSe2 with other two-dimensional (2D) materials for practical applications, which has rarely been reported so far. Here, we report that the selenization of Pt(111) can be suppressed to form a Se intercalated layer, instead of a PtSe2 monolayer, by inducing confined conditions with a precoating of graphene. Experiments with graphene-island samples demonstrate that the monolayer PtSe2 can be controllably fabricated only on the bare Pt surface, while the Se intercalated layer is formed underneath graphene, as verified by atomic-resolution observations with scanning transmission electron microscopy (STEM) and scanning tunneling microscopy (STM). In addition, the orientation of the graphene island shows a negligible influence on the Se intercalated layer induced by the graphene coating. By extending the application of 2D confined reactions, this work provides a new method to control the fabrication and pattern 2D materials during the fabrication process.

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Article Open access 09 February 2016

Md. Sajibul Alam Bhuyan, Md. Nizam Uddin, … Sayed Shafayat Hossain

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Acknowledgements

We acknowledge financial support from the National Key Research and Development Program of China (Nos. 2016YFA0202300 and 2018YFA0305800), the National Natural Science Foundation of China (Nos. 61725107 and 61971035), Beijing Natural Science Foundation (Nos. 4192054 and Z190006), Strategic Priority Research Program of the Chinese Academy of Sciences (Nos. XDB30000000 and XDB28000000).

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Author notes

  1. Zhong-Liu Liu, Zhi-Li Zhu, and Xu Wu contributed equally to this work.

Authors and Affiliations

  1. Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, China

    Zhong-Liu Liu, Zhi-Li Zhu, Jin-An Shi, Wu Zhou, Ye-Liang Wang & Hong-Jun Gao

  2. School of Information and Electronics, MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, Beijing Institute of Technology, Beijing, 100081, China

    Xu Wu, Li-Wei Liu & Ye-Liang Wang

  3. CAS Center for Excellence in Topological Quantum Computation, Beijing, 100049, China

    Ye-Liang Wang & Hong-Jun Gao

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  1. Zhong-Liu Liu
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Correspondence to Ye-Liang Wang or Hong-Jun Gao.

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Liu, ZL., Zhu, ZL., Wu, X. et al. Using graphene to suppress the selenization of Pt for controllable fabrication of monolayer PtSe2. Nano Res. 13, 3212–3216 (2020). https://doi.org/10.1007/s12274-020-2989-0

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