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Research Article

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

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.

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Graphical Abstract

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

PtSe2grapheneconfined reactionselenizationintercalation

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Nano Research
Volume 13 Issue 12,
December 2020
Pages 3212-3216
DOI: 10.1007/s12274-020-2989-0
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
Topics:
FabricationGrapheneHigh resolution transmission electron microscopyMonolayersPlatinum compoundsScanning electron microscopyScanning tunneling microscopySeleniumSelenium compoundsTransition metals

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Received: 16 June 2020
Revised: 10 July 2020
Accepted: 16 July 2020
Published: 31 July 2020
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature
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