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A method of using laser to prepare patterned graphene temperature sensor

A temperature sensor and graphene technology, applied in the field of nano-sensors, can solve the problem of rarely reported temperature sensing, and achieve the effect of safety in the preparation process

Active Publication Date: 2021-11-02
西安智疆航空科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current research on graphene sensors mainly focuses on strain sensors, and there are few reports on temperature sensing.

Method used

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  • A method of using laser to prepare patterned graphene temperature sensor
  • A method of using laser to prepare patterned graphene temperature sensor
  • A method of using laser to prepare patterned graphene temperature sensor

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preparation example Construction

[0028] In order to solve the technical problems existing in the background technology, the present invention provides a method for preparing a patterned graphene gas sensor, that is, using an ultrashort pulse laser to pattern the complete graphene so that it has a specific topological structure, each Each topological structure has a specific defect type and density to achieve the purpose of controllable defect introduction, thereby controllably reducing the thermal conductivity of graphene, so that a small change in temperature can produce a large resistance change, and then perform sensing.

[0029] A kind of method utilizing laser to prepare patterned graphene temperature sensor provided by the invention comprises the following steps:

[0030] Step 1. Put the copper foil sample loaded with graphene into the corrosion solution to etch the copper foil. After the copper in the sample is completely etched, transfer the graphene to deionized water and soak for 30 minutes. Repeat t...

Embodiment 1

[0042] The graphene on polydimethylsiloxane (PDMS) was square-etched by picosecond laser, and the temperature sensing performance of patterned graphene was detected.

[0043] The preparation steps are as follows:

[0044] (1) Preparation of transparent substrate PDMS

[0045] Mix DC184 and curing agent in a ratio of 10:1, stir well to generate air bubbles, put it into an ultrasonic cleaning instrument until the air bubbles completely disappear, pour it into a mold (150mm*150mm*10mm), and place it in an oven at 80°C for 2 hours to cure .

[0046] (2) Graphene transfer

[0047] Prepare FeCl with a concentration of 0.5mol / L 3 / HCl solution is used to etch copper, and the graphene / copper foil with an area of ​​10mm*10mm is cut and placed on the surface of the etching solution. After etching for 2 to 4 hours, transfer the graphene to deionized water with filter paper, soak for 30 minutes, then transfer to new deionized water, soak for 30 minutes, and transfer to the PDMS substra...

Embodiment 2

[0053] The graphene on polydimethylsiloxane (PDMS) was square-etched by femtosecond laser, and the temperature sensing performance of the patterned graphene sample was detected.

[0054] The preparation steps are as follows:

[0055] (1) Preparation of transparent substrate PDMS

[0056] Mix DC184 and curing agent in a ratio of 10:1, stir well to generate air bubbles, put it into an ultrasonic cleaning instrument until the air bubbles completely disappear, pour it into a mold (150mm*150mm*10mm), and place it in an oven at 80°C for 2 hours to cure .

[0057] (2) Graphene transfer

[0058] Prepare FeCl with a concentration of 0.5mol / l 3 / HCl solution is used to etch copper, and the graphene / copper foil with an area of ​​10mm*10mm is cut and placed on the surface of the etching solution. After etching for 2 to 4 hours, transfer the graphene to deionized water with filter paper, soak for 30 minutes, then transfer to new deionized water, soak for 30 minutes, and transfer to the...

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Abstract

A method for preparing patterned graphene temperature sensor by laser provided by the present invention comprises the following steps: step 1, put the copper foil sample loaded with graphene into the corrosion solution to etch the foil, and the copper foil in the sample is After being completely etched, the graphene is transferred to deionized water for cleaning, and then the graphene is transferred to a transparent substrate; step 2, a geometric pattern arranged in an array is set on a flexible substrate loaded with graphene to obtain a A flexible substrate with geometric patterns, wherein the distance between two adjacent geometric patterns is 50-1000 μm; the side length of each pattern is 30-300 μm; step 3, using a pulsed laser to etch away the geometric The geometric pattern on the flexible substrate of the picture obtains the patterned graphene formed on the surface of the transparent substrate; step 4, the patterned graphene formed on the surface of the transparent substrate is assembled into a graphene temperature sensor; the preparation process of the present invention is safe, pollution-free, and can be used in The preparation process is completed in an open environment under normal temperature and pressure; at the same time, the invention fills the blank of the temperature sensor in the aspect of flexible transparent nanometer sensor.

Description

technical field [0001] The invention belongs to the field of nanometer sensors, and in particular relates to a method for preparing a patterned graphene temperature sensor by using a laser. Background technique [0002] We are about to enter an era of wearable smart products, the most critical part of which is a flexible and transparent user interface. The emergence of graphene provides a better choice for the next generation of wearable smart products. Graphene materials have unique physical and chemical properties, such as huge specific surface area, high intrinsic mobility, high Young's modulus, high thermal conductivity, high optical transparency and high electrical conductivity; compared with carbon nanotubes, graphene is more The characteristics of softness, biocompatibility, large surface area effect and easy to be chemically modified and functionalized have laid the foundation for realizing the sensitivity, intelligence and convenience of sensors. Among the many ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/00
CPCG01K7/00
Inventor 叶晓慧姚心成刘秋昱齐明杨艳玲冯雷锁国权张荔侯小江陈志刚
Owner 西安智疆航空科技发展有限公司
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