Graphene transfer method

A transfer method, graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of affecting the electrical properties of graphene, difficult transfer of graphene, easy residue of adhesive, etc., to achieve large-scale production and improve adhesion , the effect of long transfer period

Active Publication Date: 2014-09-03
WUXI GRAPHENE FILM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, it is necessary to use "hot rolling" technology to realize the peeling of the thermal release tape, and it is difficult to transfer graphene to brittle target substrates such as glass and silicon wafers; in addition, the adhesive on the tape is easy to remain on the graphite Graphene surface is difficult to clean and affects the electrical properties of graphene

Method used

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Embodiment 1

[0043] A method for transferring graphene (bilayer), comprising the steps of:

[0044] (1) Use copper foil as a growth substrate to prepare a graphene layer by vapor phase deposition, and flatten the copper foil with a graphene layer with glass;

[0045] (2a) Attach a silicone adhesive film (adhesive is silica gel, substrate is PET) to the surface of the graphene layer grown on the copper foil by the roll-to-roll method; the graphene layer grown on the copper foil will be attached Put the adhesive film into the ammonium persulfate solution to etch, with the side of the silicone adhesive mold facing up and the side of the copper foil facing down; after 3 minutes, use deionized water and ethanol to clean the surface of the copper foil, the same method, continuous Cleaning 3 times; etching 2h, copper foil is completely removed; then the silica gel adhesive film adhered with graphene layer is taken out from the ammonium persulfate solution, and the silica gel adhesive film adhered...

Embodiment 2

[0052] A method for transferring graphene (5 layers), comprising the steps of:

[0053] (1) Use copper foil as the growth substrate to prepare graphene layer by vapor phase deposition method, and roll the copper foil with graphene layer through roll-to-roll equipment to make the copper foil film very flat;

[0054] (2a) Attach a polysilica gel film (adhesive is silica gel, substrate PI) to the surface of the graphene layer grown on the copper foil by the roll-to-roll method; the graphene layer grown on the copper foil will be attached Put the viscous film into the ferric chloride solution to etch, with the side of the viscous mold facing up and the side of the copper foil facing down; after 5 minutes, clean the surface of the copper foil with deionized water and methanol, and continue cleaning in the same way 3 times; etching for 2h, the copper foil was completely removed; then the polysilica gel sticky film with the graphene layer was taken out from the ferric chloride soluti...

Embodiment 3

[0061] A method for transferring graphene (4 layers), comprising the steps of:

[0062] (1) Use copper foil as the growth substrate to prepare graphene layer by vapor phase deposition method, and roll the copper foil with graphene layer through roll-to-roll equipment to make the copper foil film very flat;

[0063] (2a) Attach an acrylic adhesive film (adhesive is acrylate pressure-sensitive adhesive, substrate is PET) to the surface of the graphene layer grown on the copper foil by the roll-to-roll method; The sticky film of the graphene layer on the copper foil is etched in a copper chloride solution, with the sticky film side up and the copper foil side down; after 5 minutes, clean the copper foil with absolute ethanol and deionized water The same method was used to clean the surface twice continuously; the copper foil was completely removed after etching for 2 hours; The acrylic sticky film of the graphene layer is cleaned, blown dry with nitrogen, and obtains a sticky fi...

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Abstract

The invention discloses a graphene transfer method which is as follows: 1, growing grapheme on a growth substrate; 2, using an adhesive film to attach a graphene layer grown on the growth substrate, etching to remove the substrate to obtain the adhesive film attached with the graphene layer; 3, pasting the adhesive film attached with the graphene layer onto a target substrate, wherein the graphene layer is toward the target substrate, performing viscosity reducing treatment on the adhesive film, and removing the adhesive film to obtain a graphene layer transferred onto the target substrate. The graphene transfer method aims at the problems of high cost, long transfer cycle and poor graphene integrity in the graphene transfer process. The graphene transfer method using the adhesive film is simple in operation, low in cost, green and environmentally friendly.

Description

technical field [0001] The invention relates to a method for transferring graphene, which belongs to the field of conductive film materials. Background technique [0002] Graphene is a single-atom-layer two-dimensional crystal in which carbon atoms are tightly packed in a hexagonal structure. In addition to its excellent optical, thermal, and mechanical properties, graphene’s carriers behave like photons, and their intrinsic mobility can be controlled. up to 2×10 5 cm 2 / (V·S) (Large yield production of high mobility freely suspended graphene electronic devices on a polydimethylglutarimide based organic polymer, Nikolaos Tombros. et al, Journal of Applied Physics. 2011, 109, 093702.), this excellent electrical property It has great application value in high-frequency electronic devices. To realize its potential application, the primary problem is to prepare large-scale graphene with excellent electrical properties and transfer it to suitable target substrates. Chemical v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 邱玉锐
Owner WUXI GRAPHENE FILM
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