CN-121990552-A - Two-dimensional layered amorphous material and preparation method thereof

CN121990552ACN 121990552 ACN121990552 ACN 121990552ACN-121990552-A

Abstract

A two-dimensional laminated amorphous material is prepared through shaping transfer medium layer on single-layer or less-layer amorphous material on substrate, immersing in water to make substrate drop off, drying to obtain substrate, attaching the substrate to another single-layer or less-layer amorphous material with substrate, heating, attaching, immersing in water to make substrate drop off, drying to obtain transfer medium/laminated amorphous material, repeating said steps until target layer number of two-dimensional amorphous materials is stacked, and stripping the transfer medium layer. Compared with the prior art, the method can effectively regulate and control the electrical properties of the amorphous material (amorphous carbon) in the vertical direction by stacking and synthesizing the amorphous materials with different layers so as to meet different application requirements, can be applied to the preparation of the controllable layers of other two-dimensional amorphous materials, and further regulates and controls the properties and performances of the two-dimensional layered amorphous materials by regulating and controlling the interlayer interaction of the two-dimensional layered amorphous materials, thereby expanding the application range.

Inventors

ZHOU LIN
TAO XINWEI
ZHANG XINGXING

Assignees

上海交通大学
上海交通大学深圳研究院

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (10)

1. The two-dimensional layered amorphous material is characterized by comprising a single layer or a few layers of amorphous materials prepared by stacking multiple layers.
2. A method for preparing the two-dimensional layered amorphous material according to claim 1, comprising the steps of: s1, forming a transfer medium layer on a single-layer or less-layer amorphous material on a substrate, immersing the transfer medium layer in water to enable the substrate to fall off, and drying to obtain a transfer medium/single-layer or less-layer amorphous material, and marking the transfer medium layer as a base; S2, attaching a substrate to another single-layer or few-layer amorphous material with a substrate by taking the single-layer or few-layer amorphous material of the uppermost layer as a contact surface, heating and attaching, immersing in water to enable the substrate to fall off, drying to obtain a transfer medium/laminated amorphous material, and repeating the step S2 as the substrate until the two-dimensional amorphous material with the target layer number is stacked and attached on the transfer medium; and S3, stripping the transfer medium layer to obtain the two-dimensional layered amorphous material.
3. The method for producing a two-dimensional layered amorphous material according to claim 2, wherein the single-layer or less-layer amorphous material is single-layer or less-layer amorphous carbon.
4. The method for preparing a two-dimensional layered amorphous material according to claim 2, wherein in the step S1, the transfer medium layer comprises polymethyl methacrylate and/or polystyrene, and the transfer medium layer is formed by spin-coating and drying.
5. The method for preparing a two-dimensional layered amorphous material according to claim 4, wherein in step S1, the method for forming the transfer medium layer comprises spin-coating a polymethyl methacrylate solution on a single layer or a few layers of amorphous material to form a polymethyl methacrylate layer; The spin coating speeds of the polymethyl methacrylate solution and the polystyrene solution are respectively 2000-3000 rpm, and the spin coating time is respectively 40-80 s.
6. The method according to claim 2, further comprising attaching an adhesive tape to the transfer medium layer in step S1 to form an adhesive tape holder, and drying, and removing the adhesive tape before peeling the transfer medium layer in step S3.
7. The method for preparing a two-dimensional layered amorphous material according to claim 6, wherein in the step S2, the heating temperature is 120-180 ℃ and the heating time is 5-15 min.
8. The method of claim 6, wherein in step S3, before stripping the transfer medium layer, a single layer or a small layer of amorphous material is used as a contact surface, and the product obtained in step S2 is fished through the target substrate and dried.
9. The method of producing a two-dimensional layered amorphous material according to claim 2, wherein in step S3, the transfer medium layer is peeled off by dissolution.
10. The method for producing a two-dimensional layered amorphous material according to claim 9, wherein the stripping solvent used is one or both selected from toluene and acetone.

Description

Two-dimensional layered amorphous material and preparation method thereof Technical Field The invention belongs to the technical field of two-dimensional layered materials, and relates to a two-dimensional layered amorphous material, a preparation method and application thereof. Background The rise of two-dimensional layered materials opens up a new era for material science and nanotechnology. Due to the layered structure and the atomic-level thickness, the two-dimensional material not only maintains the characteristics of the block, but also shows unique properties, and has great potential in the aspects of next-generation electronics, photoelectrons, energy application and the like. Due to interlayer coupling, the properties of the two-dimensional layered material are closely related to the number of layers. Interlayer spacing is a quantitative index of interlayer coupling, and adjusting interlayer spacing is a quantitative and visual way of adjusting the properties of two-dimensional layered materials. For example, the size of the black phosphorus band gap can be adjusted by the number of layers. Calculations show that the black phosphorus bandgap size decreases with increasing number of layers and varies exponentially, increasing the bandgap from 0.59eV to 1.51eV as the number of layers decreases from 5 layers to 1 layer, and decreasing the bandgap to 0.11eV when the number of layers reaches 10 layers, very close to the value of the bulk material. In addition, the two-dimensional layered material can be assembled by the same/different two-dimensional layers in a vertical or transverse mode to form a van der Waals homoplasmic/heterostructure, so that new breakthrough of the properties of the two-dimensional layered material is realized, and the application range is greatly expanded. So far, researches on two-dimensional layered materials have been mainly focused on crystalline materials, and researches on amorphous materials have been less. Compared with a crystal material, the amorphous material lacks long-range order and predictable atomic structure, so that synthesis of the two-dimensional amorphous material with controllable layer number and regulation of properties of the two-dimensional amorphous material through interlayer interaction are difficult to realize. So far, no natural body of two-dimensional amorphous material has been found, and layered stacks are randomly distributed, so that two-dimensional amorphous materials cannot be obtained in a top-down (lift-off) manner, which means that their synthesis method is focused on direct growth from bottom to top and phase transformation of crystalline materials. Various two-dimensional amorphous materials which have been synthesized at present, including amorphous graphene, amorphous transition metal sulfide, amorphous black phosphorus, amorphous boron nitride and the like, all exhibit different properties from two-dimensional crystalline materials and are applied to the fields of electronics, optoelectronics, energy storage and electrocatalysts. However, the synthesis of a specified layer number of two-dimensional amorphous materials is still a great difficulty except for a single layer of amorphous carbon. Disclosure of Invention The invention aims to provide a two-dimensional layered amorphous material, a preparation method and application thereof, which are used for realizing the preparation of the controllable layer number of the two-dimensional amorphous material and realizing the property adjustment through interlayer interaction. The aim of the invention can be achieved by the following technical scheme: the first aspect of the invention provides a two-dimensional layered amorphous material comprising a single layer or a few layers of amorphous material prepared by stacking multiple layers. Further, the single-layer or less-layer amorphous material is single-layer or less-layer amorphous carbon. The second aspect of the present invention provides a method for preparing a two-dimensional layered amorphous material, comprising the steps of: s1, forming a transfer medium layer on a single-layer or less-layer amorphous material on a substrate, immersing the transfer medium layer in water to enable the substrate to fall off, and drying to obtain a transfer medium/single-layer or less-layer amorphous material, and marking the transfer medium layer as a base; S2, attaching a substrate to another single-layer or few-layer amorphous material with a substrate by taking the single-layer or few-layer amorphous material of the uppermost layer as a contact surface, heating and attaching, immersing in water to enable the substrate to fall off, drying to obtain a transfer medium/laminated amorphous material, and repeating the step S2 as the substrate until the two-dimensional amorphous material with the target layer number is stacked and attached on the transfer medium; and S3, stripping the transfer medium layer to obtain the two-dimensional layered amorph