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Method for preparing graphene oxide sensor

A sensor and graphene technology, applied in instruments, scientific instruments, measuring devices, etc., to achieve the effects of convenient measurement, simple process and low cost

Active Publication Date: 2015-04-29
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, sensor devices with upper and lower electrode structures need to use a complex process to prepare a gas-permeable upper electrode structure.

Method used

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  • Method for preparing graphene oxide sensor

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] A kind of method for preparing graphene oxide sensor, concrete steps are as follows:

[0032] (1) Disperse 0.2 mg of graphene oxide with a sheet number of 10 layers and a sheet size of 45 microns in 10 ml of water to form a stable graphene oxide dispersion; wherein: water can be replaced by water, ethanol, benzene , toluene, cyclohexane, dimethyl sulfoxide, cyclopentanone, cyclohexanone, and chloroform, or the combination of two or more has no effect on the results of this experiment. During actual preparation, the number of graphene oxide sheets can be 1-20 layers, and the sheet size is less than 50 microns.

[0033] (2) Carry out surface functionalization treatment to the gold nanowire material that diameter is 0.8 micron, length is 45 micron, processing method is as follows: add thioglycolic acid in gold nanowire dispersion liquid, carry out thorough stirrin...

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Abstract

The invention provides a method for preparing a graphene oxide sensor. The method comprises the following specific steps: (1) dispersing graphene oxide in a solvent, and forming stable graphene oxide dispersion liquid; (2) performing surface functionalization treatment on a metal nanowire material; (3) adding the metal nanowire subjected to surface functionalization treatment in the step (2) into the graphene oxide dispersion liquid in the step (1), uniformly mixing so as to form a mixed solution of graphene oxide and metal nanowire; (4) carrying out stirring reaction on the mixed solution in the step (3) at the temperature of 30-200 DEG C for 1-300 minutes so as to form a graphene oxide coated metal nanowire structure, wherein a continuous current path is not formed between the metal nanowires; and (5) by taking the graphene oxide coated metal nanowire structure in the step (4) as a sensitive material of the sensor, preparing the graphene oxide sensor. The method contributes to improving the sensing characteristics of the device.

Description

technical field [0001] The invention relates to a method for preparing a graphene oxide sensor, in particular to a method for preparing a sensor device by using a metal nanowire and a graphene oxide composite material. It belongs to the technical field of advanced semiconductor material preparation. Background technique [0002] Since the discovery of graphene, people have discovered more and more excellent properties of it. Such as high strength, high conductivity, high sensing sensitivity and so on. As an important derivative of graphene, graphene oxide has also received more and more attention. Current research has shown that graphene oxide has excellent sensing properties, and it is sensitive to water vapor, ammonia, nitrogen dioxide, hydrogen sulfide and other gases. Among them, the response to water vapor is the most sensitive, and its sensitivity is two orders of magnitude higher than that of traditional water vapor sensors (or humidity sensors). The high sensitiv...

Claims

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Application Information

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IPC IPC(8): G01N27/00
Inventor 万能黄见秋孙立涛
Owner SOUTHEAST UNIV
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