Loss-less transfer method for large-size graphene

A transfer method, graphene technology, applied in the field of material science, can solve the problem of difficult and non-destructive transfer of graphene

Inactive Publication Date: 2013-01-30
SOUTHEAST UNIV
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Problems solved by technology

[0003] Technical problem: The present invention aims at the problem that CVD growth of large-size graphene is difficult to transfer without damage, and transfers graphene to the target substrate by spin-coating organic solvent coating on the surface of graphene, drying the organic coating, and dissolving the copper foil substrate with a corrosion solvent On top of that, the method of removing the organic solvent coating layer, accurately controlling the process parameters, and realizing the non-destructive and efficient transfer of large-scale graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] Lossless transfer of large-scale graphene:

[0012] 1. Put the large-scale copper foil 5cm×5cm with graphene on the leveling machine horizontally, and drop-coat PMMA organic solvent on the surface of the copper foil. After the solvent completely fills the surface of the copper foil, start the leveling machine to make it Rotate at a speed of 600-1000r / min for 9-15 seconds, then quickly move the copper foil to a heating table at 130-160°C, and keep it for 3-5min to solidify the PMMA organic solvent.

[0013] 2. Put the copper foil solidified with PMMA organic solvent into ammonium persulfate ((NH 4 ) 2 S 2 o 8 ) solution to dissolve copper to obtain a graphene film coated with PMMA.

[0014] 3. Use a large-scale glass piece to slowly pull up the graphene film floating in the corrosive solution, rinse it in deionized water for 10-30 minutes, and repeat the same rinsing process 2-4 times. Then use a glass piece to slowly pull up the film floating in the clear water, ge...

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PUM

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Abstract

The invention relates to a loss-less transfer method for large-size graphene. Aimed at the problem that the CVD-grown (chemical vapor deposition-grown) large-size graphene can hardly be transferred without loss, the loss-less transfer method which includes spin coating of organic solvent coating on the surface layer of the graphene, drying of the organic coating, dissolution of a copper foil substrate by etching solvent and transferring of the graphene on the target substrate is adopted to accurately control the technological parameters of each process to realize the loss-less and high-efficiency transferring of the large-size graphene. The method includes the following steps: (A) spin coating on the large-size graphene; (B) erosion of the copper foil substrate; (C) rinsing, transferring and drying of the graphene film; (D) removal of the PMMA (polymethyl methacrylate); and thereby the loss-less large-size graphene transferred onto the sheet glass is obtained. The method can be adopted to easily, efficiently and stably transfer the whole large-size graphene onto the target substrate, thus pave the way for the application of the graphene on touch screens and other photoelectronic devices.

Description

technical field [0001] The invention belongs to the technical field of material science and is a simple and efficient large-size graphene lossless transfer technology. Background technique [0002] Due to its excellent electrical conductivity, light transmission, heat transfer and mechanical properties, graphene has shown great potential application value in many fields such as electronics and optics. Due to the controllability of composition and environment, chemical vapor deposition (CVD) has become the most effective method to prepare high-quality large-size graphene and realize its industrial application. This method is divided into two processes: the preparation and transfer of graphene. The former It has become mature, and then how to transfer the graphene grown on the copper foil substrate, especially the large-scale graphene, to the target substrate without damage is still a huge challenge, which is the key to realizing the industrial application of graphene. The pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/194
Inventor 郭新立汤铨刘建双
Owner SOUTHEAST UNIV
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