Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Nano research, 2020-12, Vol.13 (12), p.3212-3216

Ort / Verlag

Beijing: Tsinghua University Press

Erscheinungsjahr

2020

Quelle

Springer LINK 全文期刊数据库

Beschreibungen/Notizen

• Platinum diselenide (PtSe 2 ) is a promising transition metal dichalcogenide (TMDC) material with unique properties. It is necessary to find a controllable fabrication method to bridge PtSe 2 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 PtSe 2 monolayer, by inducing confined conditions with a precoating of graphene. Experiments with graphene-island samples demonstrate that the monolayer PtSe 2 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.