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Nano Research 2020, 13(12): 3212-3216 https://doi.org/10.1007/s12274-020-2989-0
Research Article | Issue | Published: 31 July 2020

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

Show Author's Information Zhong-Liu Liu1,§,  Zhi-Li Zhu1,§,  Xu Wu2,§,  Jin-An Shi1,  Wu Zhou1,  Li-Wei Liu2,  Ye-Liang Wang2,1,3( ),  Hong-Jun Gao1,3( )
Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
School of Information and Electronics, MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, Beijing Institute of Technology, Beijing 100081, China
CAS Center for Excellence in Topological Quantum Computation, Beijing 100049, China

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

Keywords:
graphene, intercalation, PtSe2, selenization, confined reaction
Topics:
FabricationGrapheneHigh resolution transmission electron microscopyMonolayersPlatinum compoundsScanning electron microscopyScanning tunneling microscopySeleniumSelenium compoundsTransition metals
Cite this article:
Liu Z-L, Zhu Z-L, Wu X, et al. Using graphene to suppress the selenization of Pt for controllable fabrication of monolayer PtSe2. Nano Research, 2020, 13(12): 3212-3216. https://doi.org/10.1007/s12274-020-2989-0
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Abstract Full text Electronic supplementary material About this article

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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About this article

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

Show Author's information Zhong-Liu Liu1,§, Zhi-Li Zhu1,§, Xu Wu2,§, Jin-An Shi1, Wu Zhou1, Li-Wei Liu2, Ye-Liang Wang2,1,3( ), Hong-Jun Gao1,3( )
Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
School of Information and Electronics, MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, Beijing Institute of Technology, Beijing 100081, China
CAS Center for Excellence in Topological Quantum Computation, Beijing 100049, China

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

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.

Keywords: graphene, intercalation, PtSe2, selenization, confined reaction

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Publication history
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Acknowledgements

Publication history

Received: 16 June 2020
Revised: 10 July 2020
Accepted: 16 July 2020
Published: 31 July 2020
Issue date: December 2020

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature

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), and Strategic Priority Research Program of the Chinese Academy of Sciences (Nos. XDB30000000 and XDB28000000).

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