Preparation method of rapidly-thinned single-element tellurene two-dimensional material

Abstract

The invention discloses a preparation method of a rapidly-thinned single-element tellurene two-dimensional material, the preparation method mainly comprises the following steps: (1) transferring a pre-prepared single-element tellurene material precipitate into deionized water, and standing for later use; (2) continuously introducing oxygen into the deionized water dispersed with the single-element tellurene material precipitate in the step (1), and heating the deionized water to obtain a single-element tellurene material dispersion liquid; and (3) dispensing the single-element tellurene material dispersion liquid obtained in the step (2) onto a target substrate by adopting a dispensing method to obtain the thin-layer single-element tellurene two-dimensional material. According to the thinning method, the thickness of the single-element tellurene two-dimensional material can be accurately controlled by controlling the flow rate of introduced oxygen and the reaction time, other polar organic solvents do not need to be adopted, new impurity molecules cannot be introduced, and the preparation process is easy to operate, high in controllability, green, environmentally friendly and suitable for industrial production, and a rapid and controllable method is provided for the preparation of the thin-layer single-element tellurene two-dimensional material.

Description

technical field [0001] The invention belongs to the field of new nanometer materials, and in particular relates to a method for preparing a thinned two-dimensional material, in particular to a method for preparing a rapidly thinned single-element tellurene two-dimensional material. Background technique [0002] Two-dimensional materials refer to materials in which electrons can only move freely (plane motion) on the nanoscale (1-100nm) in two dimensions. It was accompanied by the successful mechanical exfoliation of single Atomic layer graphite material - graphene is proposed. Generally, two-dimensional materials have a common feature: they are van der Waals layered materials, in which atoms in the plane are connected to each other through strong covalent bonds, and then stacked into bulk materials through relatively weak van der Waals interactions. Therefore, two-dimensional materials have many advantages that bulk materials do not have. First of all, due to the quantum c...

AI Technical Summary

Problems solved by technology

At present, there are mainly the following methods for preparing tellurene materials: mechanical exfoliation, hydrothermal synthesis, physical vapor deposition, and molecular beam epitaxy. Among them, hydrothermal synthesis is the mainstream method for preparing tellurene materials. Simple, environmentally friendly, and mass-producible, but the thickness of tellurene two-dimensional materials prepared based on this method is generally greater than 100nm, which is not conducive to its subsequent application in optoelectronic devices

At present, there are few methods for studying the thickness reduction of tellurene 2D materials

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