Wet transferring method of graphene

A wet transfer and graphene technology, applied in the field of graphene, can solve problems such as wrinkles, incomplete removal of protective layer, and residual impurities on the surface of graphene, so as to prevent cracks and wrinkles, achieve no impurity pollution, and high-quality transfer Effect

Inactive Publication Date: 2018-12-21
BEIJING GUANGKEBOYE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has certain problems, such as the residue of impurities on the surface of graphene, wrinkles during the transfer process, and incomplete removal of the protective layer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of method of wet transfer graphene of the present embodiment, comprises the steps:

[0039] (1) Cut a piece of 10mm×10mm copper foil with graphene, and fix it on the surface of a square glass sheet with adhesive tape. The purpose is to ensure that the graphene film is flat. On the turntable, start the vacuum pump and homogenizer, set the low speed to 30rd / min, rotate for 3s, and the high speed to 3000rd / min, rotate for 20s, use a syringe to draw PMMA with a mass fraction of 0.4%, choose anisole as the solvent, and drop evenly on the On the surface of the copper foil, then quickly cover the lid, start the spin coating, and form copper / graphene / PMMA;

[0040] (2) Remove the spin-coated PMMA copper foil and cure it for 10 minutes at a temperature of 150°C;

[0041] (3) Grind the side of the graphene copper foil that is not spin-coated with PMMA with fine sandpaper, put it into a 0.1mol / L ammonium persulfate solution to etch the copper foil, and use a clean glass pi...

Embodiment 2

[0046] A kind of method of wet transfer graphene of the present embodiment, comprises the steps:

[0047] (1) Cut a piece of 20mm×20mm copper foil with graphene, and fix it on the surface of a square glass sheet with adhesive tape. The purpose is to ensure that the graphene film is flat. On the turntable, start the vacuum pump and the homogenizer, set the low speed to 10rd / min, rotate for 10s, and the high speed to 1500rd / min, rotate for 60s, use a syringe to absorb PMMA with a mass fraction of 2.2%, choose acetone as the solvent, and evenly drop it on the copper foil on the surface, then quickly put the lid on, start the spin coating, and form copper / graphene / PMMA;

[0048] (2) Remove the spin-coated PMMA copper foil and cure it for 180min at a temperature of 120°C;

[0049] (3) Polish the side of the graphene copper foil that is not spin-coated with PMMA with fine sandpaper, put it into a 0.5mol / L ferric chloride solution to etch the copper foil, and use a clean glass sheet t...

Embodiment 3

[0053] A kind of method of wet transfer graphene of the present embodiment, comprises the steps:

[0054] (1) Cut a piece of 20mm×20mm copper foil with graphene, and fix it on the surface of a square glass sheet with adhesive tape. The purpose is to ensure that the graphene film is flat. On the turntable, start the vacuum pump and homogenizer, set the low speed to 20rd / min, rotate for 6s, and the high speed to 2200rd / min, rotate for 40s, use a syringe to absorb PMMA with a mass fraction of 4%, use acetone as the solvent, and evenly drop it on the copper foil on the surface, then quickly put the lid on, start the spin coating, and form copper / graphene / PMMA;

[0055] (2) Remove the spin-coated PMMA copper foil and cure it for 100 minutes at a temperature of 135°C;

[0056] (3) Polish the side of the graphene copper foil that is not spin-coated with PMMA with fine sandpaper, put it into a 1mol / L ferric chloride solution to etch the copper foil, and use a clean glass piece to rem...

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Abstract

The invention discloses a wet transferring method of graphene. The method comprises the following steps: coating the surface of graphene which grows on a metal foil with a layer of PMMA to obtain metal / graphene / PMMA; heating and curing the PMMA on the surface of the graphene; etching a metal substrate; transferring the metal / graphene / PMMA on a target substrate; coating the surface of the transferred graphene / PMMA with a layer of PMMA; heating and curing; and removing the PMMA to obtain the target substrate / graphene. According to the method, two layers of PMMA are rotatably coated beforeand after transferring the graphene to the target substrate; after a combined body of the PMMA and the graphene is transferred to the target substrate, the surface of the PMMA is rotatably coated witha layer of PMMA, and then the PMMA is heated and cured, so that the stress in the first layer of PMMA can be released, and as a result, the graphene is closed to the target substrate, and cracks andwrinkles can be prevented; and meanwhile, the PMMA on the surface of the graphene can be completely removed.

Description

technical field [0001] The invention belongs to the technical field of graphene, in particular to a method for wet transfer of graphene. Background technique [0002] Graphene is a two-dimensional material composed of a single layer of carbon atoms arranged in a regular hexagon, and has excellent physical, mechanical, chemical and electrical properties. It is the thinnest material in the world with a thickness of only 0.34nm. It has a large specific surface area and excellent ductility. Since graphene was first isolated in 2004, physicists Andre Geim (Andre Geim) and Konstantin Novoselov (Konstantin Novoselov) of the University of Manchester in the United Kingdom have been working on the "two-dimensional graphene material". After jointly winning the 2010 Nobel Prize in Physics, graphene, as a new material, has attracted attention in cutting-edge future fields such as supercars, IoT sensors, wearable devices and health management, data communications, energy technology, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194
CPCC01B32/194
Inventor 冯贺田陆
Owner BEIJING GUANGKEBOYE SCI & TECH
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