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Graphene and nano silver compositing method

A nano-silver and graphene technology, which is applied in the composite field of graphene and nano-silver, can solve the problems of graphene damage, graphene high square resistance, poor adhesion, etc., and achieve the goal of improving conductivity, reducing damage, and reducing contact resistance Effect

Inactive Publication Date: 2016-08-10
WUXI HUICHENG GRAPHITE ALKENE TECH APPL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem of high square resistance of graphene caused by defects in the transfer process, a layer of nano-silver is coated on the surface of the transferred graphene. Nano-silver can reduce the square resistance of the film by bridging the damaged graphene. , but the existing technology generally adopts the transfer of graphene, and then coats the nano-silver on the graphene. Due to the poor adhesion of the graphene on the target substrate after the transfer, it is easy to produce graphene when coating the nano-silver. In addition, the residue of the transfer film during the graphene transfer process can easily hinder the direct contact between graphene and nano-silver, affect the bridging effect of nano-silver, and cannot reduce the square resistance of graphene

Method used

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Experimental program
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Effect test

Embodiment 1

[0029] A composite method of graphene and nano-silver, comprising the steps of:

[0030] S1, grow graphene layer 2 by chemical vapor deposition on copper foil 1 to form copper foil 1 / graphene layer 2, such as figure 1 Shown; Wherein, graphene layer 2 is pure graphene layer or doped type graphene layer;

[0031] S2, put the copper foil 1 / graphene layer 2 into the nano-silver isopropanol solution, and deposit the nano-silver layer 3 on the graphene layer 2 by electrophoresis to form the copper foil 1 / graphene layer 2 / nano-silver layer 3 ,Such as figure 2 Shown; Wherein, the concentration of nano-silver isopropanol solution is 1mg / mL, and the diameter of wherein said nano-silver is 10nm, and length is 10 μm; Described electrophoresis current adopts alternating current, and described alternating current voltage is 5V, and frequency is 50Hz ;

[0032] S3, paste the PDMS film 4 on the nano-silver layer 3, corrode the copper foil 1 in the ammonium persulfate solution, wash away t...

Embodiment 2

[0036] A composite method of graphene and nano-silver, comprising the steps of:

[0037] S1, grow graphene layer 2 by chemical vapor deposition on copper foil 1 to form copper foil 1 / graphene layer 2, such as figure 1 Shown; Wherein, graphene layer 2 is pure graphene layer or doped type graphene layer;

[0038] S2, put the copper foil 1 / graphene layer 2 into the nano-silver isopropanol solution, and deposit the nano-silver layer 3 on the graphene layer 2 by electrophoresis to form the copper foil 1 / graphene layer 2 / nano-silver layer 3 ,Such as figure 2 Shown; Wherein, the concentration of nano-silver isopropanol solution is 50mg / mL, and the diameter of wherein said nano-silver is 55nm, and length is 120 μm; Described electrophoresis current adopts alternating current, and described alternating current voltage is 30V, and frequency is 250Hz ;

[0039] S3, paste the PDMS film 4 on the nano-silver layer 3, corrode the copper foil 1 in the ammonium persulfate solution, wash aw...

Embodiment 3

[0043] A composite method of graphene and nano-silver, comprising the steps of:

[0044] S1, grow graphene layer 2 by chemical vapor deposition on copper foil 1 to form copper foil 1 / graphene layer 2, such as figure 1 Shown; Wherein, graphene layer 2 is pure graphene layer or doped type graphene layer;

[0045] S2, put the copper foil 1 / graphene layer 2 into the nano-silver isopropanol solution, and deposit the nano-silver layer 3 on the graphene layer 2 by electrophoresis to form the copper foil 1 / graphene layer 2 / nano-silver layer 3 ,Such as figure 2Shown; Wherein, the concentration of nano-silver isopropanol solution is 100mg / mL, and the diameter of wherein said nano-silver is 100nm, and length is 500 μ m; Described electrophoresis current adopts alternating current, and described alternating current voltage is 50V, and frequency is 500Hz ;

[0046] S3, paste the PDMS film 4 on the nano-silver layer 3, corrode the copper foil 1 in the ammonium persulfate solution, wash ...

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Abstract

The invention discloses a graphene and nano silver compositing method comprising the following steps: (1) growing a graphene layer on a copper foil through a chemical vapor deposition method to form a copper foil / graphene layer; (2) putting the copper foil / graphene layer in nano silver isopropyl alcohol solution, and depositing a nano silver layer on the graphene layer through an electrophoresis method to form a copper foil / graphene layer / nano silver layer; (3) pasting a PDMS film on the nano silver layer, corroding copper foil in ammonium persulfate solution, washing away impurity ions absorbed on the surface, and carrying out drying to get a graphene layer / nano silver layer / PDMS film; and (4) jointing the graphene layer / nano silver layer / PDMS film and a target base layer, carrying baking, and removing the PDMS film to get a target base layer / graphene layer / nano silver layer. According to the invention, the electrophoresis method is employed to composite nano silver and graphene and make graphene and nano silver contact fully, the contact resistance of nano silver and graphene is reduced effectively, and the conductivity of the composite film is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing transparent conductive film materials, in particular to a composite method of graphene and nano-silver. 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. Reaching 2×105cm2 / (V·S) (J.Appl.Phys.2011, 109, 093702.), this excellent electrical property makes it have great application value in high-frequency electronic devices. [0003] In order to solve the problem of high square resistance of graphene caused by defects in the transfer process, a layer of nano-silver is coated on the surface of the transferred graphene. Nano-silver can reduce the square resistance of the film by bridging the damaged graphene. , but the existing technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00
Inventor 王振中
Owner WUXI HUICHENG GRAPHITE ALKENE TECH APPL CO LTD