Operating method for transferring graphene

Abstract

The invention discloses an operation method for transferring graphene. The method comprises the following steps: spin-coating one side of graphene of a growth substrate / graphene with molten paraffin,and spin-coating a paraffin layer with a protective layer material to obtain a growth substrate / graphene / paraffin / protective layer composite structure; removing the growth substrate by using a corrosive solution to obtain a graphene / paraffin / protective layer composite structure; reducing wrinkles of graphene by means of the high thermal expansion coefficient of paraffin, then transferring the graphene / paraffin / protective layer composite structure to a target substrate from the water surface to obtain the target substrate / graphene / paraffin / protective layer composite structure; and dissolving the protective layer and the paraffin layer in the target substrate / graphene / paraffin / protective layer composite structure to obtain a target substrate / graphene combination, and cleaning and drying thetarget substrate / graphene combination to complete transfer. According to the operation method provided by the invention, the paraffin layer is spin-coated with the protective layer, so that the graphene film can be cleanly transferred to the target substrate in a large area.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, relates to the technical field of graphene clean transfer, in particular to an operation method for transferring graphene. Background technique [0002] Graphene is an allotrope of carbon with a two-dimensional structure, which consists of a single layer of hybridized carbon atoms closely arranged with each other, and has a honeycomb network crystal structure. Since it was prepared for the first time in 2004, it has started an upsurge in the research of two-dimensional materials. The unique structure makes graphene have many novel physical and chemical properties, including many aspects such as electricity, optics and mechanics, such as extremely low resistivity, ultra-high electron mobility, high surface area, good mechanical strength, and compatibility with High compatibility of macromolecules and biomolecules. Because the graphene single-layer structure cannot exist alone in the ...

AI Technical Summary

Problems solved by technology

At present, the most commonly used dielectric material is polymethyl methacrylate (PMMA), and the problem is that the transfer medium is difficult to completely remove

The latest transfer medium uses paraffin wax as the transfer medium. With the help of the saturated alkane and high thermal expansion coefficient of paraffin wax, the clean and wrinkle-free transfer of graphene can be realized; however, the limitation of this method is that the paraffin wax protective layer is more stable than the PMMA layer. The mechanical properties are worse, and the paraffin layer is easily broken during the transfer process, resulting in a long transfer process, a large workload, and a low integrity rate. At the same time, it is difficult to achieve large-area continuous graphene transfer

Images