Two-dimensional inorganic molecular crystal materials and preparation method thereof

Abstract

The invention relates to two-dimensional inorganic molecular crystal materials and a preparation method thereof, and belongs to the field of preparation of two-dimensional materials. The two-dimensional inorganic molecular crystal materials are two-dimensional flaky materials formed by tiling inorganic molecules; the inorganic molecules in the two-dimensional flaky materials are connected by van der Waals force. The preparation method is characterized in that a vapour deposition method is adopted; molecular crystal powder is taken as a raw material; the molecular crystal powder is evaporated into a gas-state precursor; the gas-state precursor is transported with carrier gas and is deposited on a substrate under the effect of a passivating agent to obtain two-dimensional inorganic molecular crystal flakes. Two-dimensional inorganic molecular crystals obtained by the method are of two-dimensional flaky structures formed by the inorganic molecules, and the molecules are connected by the van der Waals force. The preparation method is simple, low in cost and strong in universality. By utilizing the method involved in the invention, the two-dimensional inorganic molecular crystal materials with uniform thickness and consistent shapes are prepared, and have wide prospects in the application of phase-change devices.

Description

technical field [0001] The invention belongs to the field of preparation of two-dimensional materials, and more specifically relates to a two-dimensional inorganic molecular crystal material and a preparation method thereof. Background technique [0002] Since the discovery of graphene in 2004 [Science 306, 666-669(2004)], two-dimensional (2D) materials have attracted worldwide attention immediately. Two-dimensional materials have many remarkable physical and chemical properties, such as atomic-level thickness, quantum confinement effect, optical transparency, good mechanical strength and flexibility, etc., which are ideal platforms for discovering new properties and constructing electronic devices [Nature 556, 43–50(2018)]. According to the dimensions of the crystal structure, the two-dimensional inorganic materials currently studied are all atomic crystals, which are mainly divided into three types: three-dimensional non-van der Waals structures (such as Fe 2 o 3 ), two...

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Problems solved by technology

[0003] At present, there are few reports on devices made of two-dimensional inorganic molecular crystal materials, which are ...

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