Two-dimensional material transfer method based on water phase change

Abstract

A two-dimensional material transfer method based on water phase change comprises the following steps: preparing a to-be-transferred sample, namely fixing a two-dimensional material with an original substrate on an auxiliary substrate, then placing a mold with the same cross section size on the two-dimensional material, injecting distilled water into the mold, freezing the distilled water into an ice pillar, after the distilled water is completely frozen into the ice pillar, separating the ice pillar attached with the two-dimensional material from the upper surface of the original substrate through mechanical force, then quickly placing the ice pillar with the two-dimensional material on a target substrate, and completely transferring the two-dimensional material to the target substrate after the ice pillar is removed. According to the invention, large-scale, pollution-free and high-quality transfer of the two-dimensional material to any substrate can be realized.

Description

technical field [0001] The invention relates to the technical field of two-dimensional material transfer, in particular to a two-dimensional material transfer method based on water phase transition. Background technique [0002] As a new type of two-dimensional material, graphene has high strength-to-mass ratio, creep resistance, tensile strength and high toughness compared with traditional materials; it is flexible, wearable, and attachable; and has high light transmittance. , electrical conductivity, thermal conductivity and other characteristics, therefore, graphene has broad application prospects in the fields of medical health, aerospace, microelectronics, energy storage, sensing and communication. However, the existing large-scale and low-cost production of graphene, especially the method of single-layer graphene film is chemical vapor deposition method, the limitation of this method is that it can only grow with copper foil as the growth substrate of graphene, graphit...

AI Technical Summary

Problems solved by technology

However, the existing large-scale and low-cost production of graphene, especially the method of single-layer graphene film is chemical vapor deposition method, the limitation of this method is that it can only grow with copper foil as the growth substrate of graphene, graphite The application of graphene films necessarily involves the transfer of graphene films from copper substrates to target substrates.

[0003] The existing transfer methods of two-dimensional materials such as graphene mainly include dry transfer, wet transfer, and liquid bridge-assisted transfer, etc., but there are various problems, and it is difficult to realize the transfer of copper-based graphene film to any other substrate. High-quality transfer, mainly: problems related to polymer contamination, high-temperature annealing and insufficient transfer power

Electronic devices prepared by these methods are difficult to truly play the ideal properties of two-dimensional materials such as graphene

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