A platinum diselenide in-plane puzzle structure material and its preparation and modulation method

Abstract

The invention discloses a platinum diselenide (PtSe2) in-plane puzzle structure material, which simultaneously comprises two configurations: a triangular prism type configuration (H type) and an octahedron type configuration (T type). The triangular prism type configuration (H type) and the octahedron type configuration (T type) form a triangular structural domain, and the structural domain formedby the triangular prism type configuration (H type) and the structural domain formed by the octahedron type configuration (T-type) alternate with each other and periodically expand on the surface ofa substrate. The in-plane puzzle structure formed by the two configurations of a two-dimensional platinum diselenide crystalline material in large area is grown by a molecular beam epitaxy method andcan be modulated, thereby greatly facilitating the further study of application and development of the two-dimensional platinum diselenide crystalline material in the aspect of nanoelectronic devices.

Description

technical field [0001] The invention relates to an in-plane mosaic structure of a transition metal dichalcogenide two-dimensional crystal material and a preparation and modulation method thereof, belonging to the technical field of nanomaterials. Background technique [0002] The discovery of graphene, its superior physical properties and great application potential have inspired people to explore other two-dimensional atomic crystal materials and their structural regulation. With the development and progress of preparation methods of crystalline materials in recent years, people began to pay attention to other new two-dimensional atomic crystal materials with graphene-like properties. Transition metal dichalcogenides are one of them. Transition metal dichalcogenides have a layered structure similar to graphene, and their chemical formula is usually expressed as MX2, where M represents a transition metal element, and X represents a chalcogen element (sulfur, selenium and te...

AI Technical Summary

Problems solved by technology

[0004] Monolayer platinum diselenide (chemical formula: PtSe2) two-dimensional crystalline material is a new type of two-position transition metal dichalcogenide material that has been successfully prepared in recent years. Both theory and experiments have proved that its octahedral (T-type) is a stable structure. The type is a semiconductor with a band gap of 1.2eV, which has good photocatalytic properties; while its triangular prism type (H type) is a metal, which has not been reported yet.

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