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Electrochromic sensor array and manufacturing method and application method thereof

A sensor array and electrochromic technology, applied in the field of electrochemical detection and analysis, can solve the problems of increasing the complexity and cost of detection, affecting the portability of paper chips, and low sensitivity of colorimetry, achieving simple and fast detection process and fast detection. , prepare a simple effect

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the analysis methods based on the paper chip technology platform are mainly divided into two categories, one is qualitative analysis methods such as colorimetry, this type of method can only give a "yes / no" signal response, and the sensitivity of colorimetry The other type is quantitative analysis methods such as electrochemical detection method, which converts biological signals into electrical signals through oxidation-reduction reactions. This type of method has high detection sensitivity and fast response speed, but requires special detection The detection of the result by the instrument increases the complexity and cost of the detection, and affects the portability of the paper chip

Method used

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  • Electrochromic sensor array and manufacturing method and application method thereof
  • Electrochromic sensor array and manufacturing method and application method thereof
  • Electrochromic sensor array and manufacturing method and application method thereof

Examples

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Embodiment 1

[0036] Embodiment 1 Electrochromic sensor array based on naked eye detection

[0037] An electrochromic sensor array based on naked-eye detection consists of six sensors, and each sensor consists of two parts: a battery part and a sensing part.

[0038] Such as figure 1 As shown, the sensing part includes an ITO electrode and a sample reaction cell. The ITO electrode includes a working electrode 1 and a reference electrode 2, both of which are made of ITO thin film material, wherein the working electrode is decorated with Prussian blue dots 3 as indicators. The diameter of the Prussian blue dot 3 is 1.12 mm, which is modified on the surface of the working electrode 1 by electrodeposition. The deposition solution used in the deposition method is a 60 μL solution with a pH of 2.0. The solution contains 10 mM ferric chloride, 10 mM potassium ferricyanide and 2.6 mM hydrochloric acid. The sample reaction cell includes a cathode reaction area 7 and an anode reaction area 9, and ...

Embodiment 2

[0041] Example 2 Preparation of Electrochromic Sensor Array Based on Naked Eye Detection

[0042]The preparation process of the electrochromic sensor array based on naked-eye detection provided by the present invention includes the following steps:

[0043] a) Cut out two rectangular ITO films with a laser cutting machine as figure 1 The corresponding shape in the sensor array is used as the substrate of the sensor array, that is, the ITO film is cut along the direction parallel to the first side of the rectangular ITO film, so that the second side perpendicular to the first side is separated from each other to form 6 strips. a shape part, the third side parallel to the second side is connected to each other, thereby forming a comb structure;

[0044] Take a cut ITO film, use the comb part as the reference electrode 2, coat the comb handle part connected to each other at one end of the comb part with 2mm×15mm rectangular ink and dry it in the shade to form the positive electr...

Embodiment 3

[0064] Embodiment 3 Detection of lactic acid based on an electrochromic sensor array detected by the naked eye:

[0065] The electrochromic sensor array based on naked-eye detection in embodiment 1 is used to detect lactic acid, comprising the following steps:

[0066] 1) Configure a saturated sodium chloride solution, suck the solution into the paper 6 of the battery part, and make the aluminum-oxygen battery conduct.

[0067] 2) The negative electrode of the aluminum-oxygen battery is aluminum foil, the positive electrode is carbon ink material, and the paper is used as the electrolytic cell in the middle. When the electrolyte is sucked into the paper, the battery is turned on, and the aluminum-oxygen reaction occurs, generating a voltage of about 1V for chip sensing React uses. The working principle of the sensing part is that when the lactic acid solution is inhaled, the lactic acid reduces potassium ferricyanide to potassium ferrocyanide under the action of lactate oxida...

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Abstract

The invention discloses an electrochromic sensor array and a manufacturing method thereof, and successfully applies the sensor array to lactic acid detection. The sensor array comprises a plurality of sensors, wherein each sensor comprises a battery portion and a sensing portion; the sensing portion comprises a sensing electrode and a sample reaction pool; a working electrode of the sensing electrode is modified with a Prussian blue point; a cathode reaction zone and an anode reaction zone of the sample reaction pool comprises substrates made of paper and detection reagents; the detection reagent in the cathode reaction zone is a buffer solution containing lactate oxidase; the reaction reagent in the anode reaction zone is a buffer solution containing potassium ferricyanide. During lactic acid detection, the number of color changing points in an indication point array is different according to different concentrations of lactic acid to be detected. The concentration of the lactic acid can be judged by observing the number of color changing indication points with naked eyes. The sensor array is easy to manufacture, is convenient to use, does not need any detection circuit, and has a very good application value; a reaction result can be directly observed with the naked eyes.

Description

technical field [0001] The invention belongs to the field of electrochemical detection and analysis, in particular to an electrochromic sensor array based on naked-eye detection and a preparation method thereof, which is used for semi-quantitative detection of lactic acid. Background technique [0002] In 2007, the Whiteside research group of Harvard University proposed the concept of paper-on-a-chip laboratory for the first time, that is, the basic units of sample preparation, reaction, separation, and detection in the biological, chemical, and medical analysis processes were integrated on paper. Because the paper chip laboratory has the advantages of low cost, simple preparation method (using simple printing technology, and no harsh conditions such as clean room), simple operation (no additional equipment, such as pumps, etc.), and can be treated arbitrarily after use, etc. widespread attention of the people. [0003] At present, the analysis methods based on the paper ch...

Claims

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Application Information

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IPC IPC(8): G01N21/69
CPCG01N21/69
Inventor 刘宏张凤玲蔡天一马良詹李源
Owner SOUTHEAST UNIV
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