Graphene composite nano gold thin film flexible strain sensor manufacturing method and strain sensor thereof

A graphene composite, strain sensor technology, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement device, etc., can solve the problems of decreased sensitivity of the strain sensor, insignificant change of the resistance of wrinkled graphene, etc., and achieves low cost, easy operation, good controllability

Inactive Publication Date: 2016-07-20
SHENZHEN RES INST OF WUHAN UNIVERISTY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this wrinkled graphene can protect the integrity of the graphene itself, the resistance of the wrinkled graphene does not change significantly during the deformation process, which reduces the sensitivity of the strain sensor.

Method used

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  • Graphene composite nano gold thin film flexible strain sensor manufacturing method and strain sensor thereof
  • Graphene composite nano gold thin film flexible strain sensor manufacturing method and strain sensor thereof
  • Graphene composite nano gold thin film flexible strain sensor manufacturing method and strain sensor thereof

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Experimental program
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Effect test

Embodiment 1

[0026] figure 1 The scanning electron microscope (SEM) figure of the graphene composite nano-gold film flexible film prepared for the preferred embodiment 1 of the preparation method of the graphene composite nano-gold film flexible strain sensor of the present invention, in the present embodiment: 30 * 30mm 2 Small and large copper foils were cleaned with alcohol and acetone and placed in the middle of the quartz tube of a tube furnace. Turn on the vacuum pump, and raise the temperature of the tube furnace to 1100° C. under a hydrogen atmosphere of 10 sccm, with a heating rate of 10° C. / min. When the copper foil reaches the target temperature, 10 sccm of methane is introduced, and the methane is turned off after 20 minutes. Under the hydrogen atmosphere, the single-layer graphene was obtained on the copper foil with the furnace cooling down. When the selected copper foil grows, the side that is not attached to the quartz tube is spin-coated with polymethyl methacrylate, nam...

Embodiment 2

[0028] In this embodiment, the experimental conditions for preparing the PDMS film of the graphene composite nano-gold film are the same as in Example 1. Coating silver paste on both ends of the PDMS film of the graphene composite nano-gold film, and connecting copper wires, a new type of graphene composite nano-gold film flexible strain sensor is obtained.

Embodiment 3

[0030] In this embodiment, the experimental conditions for preparing the PDMS film of the graphene composite nano-gold film are the same as in Example 1. The two ends of the PDMS film of the graphene composite nano-gold film are coated with silver paste and connected with a copper wire to obtain a flexible strain sensor of the graphene composite nano-gold film. Connect the two ends of the copper wire to the working electrode and the reference electrode of the electrochemical workstation respectively, and make it produce a strain from 0% to 25% by stretching the strain sensor, and the current change recorded on the electrochemical workstation is the result The "strain-resistance change curve", such as figure 2 shown. This curve shows that the sensitivity of the graphene-composite gold nano-film flexible strain sensor is very high.

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Abstract

The invention discloses a graphene composite nano gold thin film flexible strain sensor manufacturing method and a strain sensor thereof. The method comprises the following steps: monolayer graphene is acquired on a copper foil, and a copper-based graphene is generated; a PDMS thin film compounded with the graphene is generated; the PDMS thin film compounded with the graphene is subjected to gold target sputtering in a sputtering device, and a graphene composite nano gold thin film is generated; silver paste is applied to two ends of the graphene composite nano gold thin film, a copper wire is connected, and thus, the graphene composite nano gold thin film flexible strain sensor is obtained. The method of the invention has the advantages that the process is simple; the operation is easy; the cost is low; the controllability is good; large-scale production can be carried out; and a feasible manufacturing method is provided for actual applications of the graphene flexible electronics device and the strain sensor.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment, and in particular relates to a preparation method of a graphene composite nano-gold film flexible strain sensor and the strain sensor. Background technique [0002] Carbon has many allotropes, the most well-known of which are graphite and diamond. In 2004, Professor Andre Geim and researcher Kostya Novoselov from the Department of Physics and Astronomy at the University of Manchester in the United Kingdom prepared single-layer graphene for the first time by repeatedly pasting and tearing highly oriented pyrolytic graphite (HOPG) with scotch tape. Graphene is a crystal with a two-dimensional honeycomb lattice structure formed by a single layer of carbon atoms tightly packed. The thickness of the graphite crystal film is only 0.335nm. Its unique two-dimensional structure makes it have excellent electrical, mechanical, thermal and chemical properties. It is used in electrical, mechanic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16
CPCG01B7/18
Inventor 潘春旭罗成志吴俊胡艳
Owner SHENZHEN RES INST OF WUHAN UNIVERISTY
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