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Graphene transfer method taking copper foil as substrate

A transfer method and graphene technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of residual metal solution, prone to cracks in graphene, low quality of graphene transfer, etc., achieving less damage, Improves overall transfer quality and reduces wrinkles

Inactive Publication Date: 2020-07-28
南通晶锐新型碳材料科技有限公司
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AI Technical Summary

Problems solved by technology

The principle of this method is relatively simple, but the graphene transferred by this method is prone to cracks, the PMMA solution cannot be completely removed, and the metal solution will remain, resulting in low transfer quality of graphene

Method used

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  • Graphene transfer method taking copper foil as substrate

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Embodiment Construction

[0022] The scheme of the present invention will be described in more detail below in conjunction with the flow chart.

[0023] Such as figure 1 As shown, the specific steps of a copper foil substrate graphene transfer method provided in this embodiment are as follows.

[0024] (1) Adhere the copper foil graphene sample prepared by the chemical vapor deposition method on the cover glass with adhesive tape, and stick it on all four sides. If the copper sheet is not flat, flatten it with two coverslips.

[0025] (2) Place the above sample on the suspension coating apparatus, drop two drops of PMMA solution, and carry out suspension coating.

[0026] (3) After the application, gently tear off the tape, let it dry naturally, and do not bend the copper sheet.

[0027] (4) Put the copper sheet into the ammonium persulfate solution (concentration not exceeding 0.5ml / L) and let it stand for 3 minutes. Then take out the copper sheet, place the copper sheet in turn on the dust-free pa...

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Abstract

The invention relates to a method for transferring graphene on a copper foil substrate. The method comprises the following steps of: firstly, airing the graphene on the copper foil substrate; suspending and coating a prepared PMMA solution on the graphene / copper foil to form a PMMA / graphene / copper foil composite layer; and etching by using an ammonium persulfate solution. In order to improve the transfer quality of graphene, acetone and isopropanol are used for treating a silicon wafer in advance, then the PMMA / graphene composite layer is placed on the silicon wafer, then the silicon wafer substrate is heated, then the composite layer is soaked in an acetone solution to remove the PMMA solution, and finally the silicon substrate graphene is successfully obtained. According to the method, the defects of wrinkles, cracks and the like of the transferred graphene are reduced, the metal particles on the target substrate are removed to the greatest extent, the hydrophilicity is enhanced, andthe transfer quality of the graphene is improved.

Description

technical field [0001] The invention belongs to the technical field of metal substrate graphene transfer, in particular to a copper foil substrate graphene transfer technology. . Background technique [0002] Graphene is a new type of carbon nanomaterial with only one carbon atomic layer thickness. Because of its excellent optical, electrical and mechanical properties, it is widely used in microcomputers, screen displays, sensors, solar cells, semiconductor materials, and protective coatings. layers and play an important role. [0003] Since its publication in 2004, how to efficiently prepare graphene has attracted the close attention of researchers, and theories and methods for preparing graphene have emerged in an endless stream. In addition to the traditional mechanical stripping and redox methods, there are also chemical vapor deposition and epitaxial growth methods that have been widely used. [0004] Copper substrates are commonly used to prepare graphene, because c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194
CPCC01B32/194
Inventor 吴海燕
Owner 南通晶锐新型碳材料科技有限公司
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