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Method for modifying indium tin oxide electrochemiluminescence reaction electrodes

A technology of indium tin oxide and light-emitting electrodes, which is applied in the field of modification of indium tin oxide electrochemiluminescent reaction electrodes, can solve problems such as affecting the prospect and instability of indium tin oxide electrodes, and achieves good effect, low cost and uniform distribution

Inactive Publication Date: 2015-09-09
彭梓 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, indium tin oxide electrodes are not stable in aqueous solution, which affects the prospect of its further application

Method used

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  • Method for modifying indium tin oxide electrochemiluminescence reaction electrodes

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Experimental program
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Effect test

specific Embodiment 1

[0016] Indium tin oxide surface treatment: put the indium tin oxide electrode in 1% Triton X-100, absolute ethanol, and ultrapure water for ultrasonic cleaning for 20 min, and then use a volume ratio of deionized water: 30% hydrogen peroxide: 24 %Ammonia water=5:1:1 The mixed solution was boiled for 30 minutes to activate the surface of the indium tin oxide electrode. Ultrapure water was used to ultrasonically clean again for 20 min, and then the surface of the electrode was blown dry with dry nitrogen and treated at 110 °C for 30 min.

specific Embodiment 2

[0017] Ink dot spraying: Put indium tin oxide into the inkjet machine at room temperature, set the inkjet dot diameter (ink dot diameter range: 0.1 micron to 100 micron) and dot pitch (ink dot diameter range: 0.1 micron to 100 micron microns). Using UV ink (trimethylolpropane triacrylate 50%, dimethylphenylacetamide 12%, isopropylthioxanthone 1%, ethyl p-dimethylaminobenzoate 1%, toluene 25%, polymethyl methacrylate 10%, coloring agent 1%). The indium tin oxide electrodes covered by ink dots need to be dried in an oven immediately. The drying temperature is 80±5°C for 10-15 minutes. In this process, it is necessary to accurately control the drying conditions. If the temperature is too high or the time is too long, it will easily lead to difficulty in developing and difficult to remove the film. After drying, the electrodes are air-cooled or naturally cooled. The dried electrode needs to be gold-plated within 24 hours.

specific Embodiment 3

[0018] Cyanide-free gold plating process: Solution A: 0.5-2.5 grams of gold trichloride (AuCl 3 ) use distilled water to make a solution with a gold content of 20% to 25%, and then use 50% potassium hydroxide solution to neutralize the pH value to be 8 to 10;

[0019] Solution B: Dissolve 20-30 grams of ammonium sulfite in 50-60 mL of hot distilled water;

[0020] Preparation of gold plating solution: slowly add solution A to solution B and keep stirring, heat the mixed solution to 55-60°C until the solution becomes colorless and transparent, add 10-15 grams of potassium citrate, adjust the pH value to 8.5, and dilute to 100mL;

[0021] Temperature: 45~65℃;

[0022] Cathode current density: 0.1~0.8 A / dm 2 .

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Abstract

The invention provides a method for modifying indium tin oxide electrochemiluminescence reaction electrodes. An ink spot-spray protective coating process is adopted as a film coating mode for the method which includes (1), covering the surface of each indium tin electrode with a discontinuous spot ink protective layer in an inkjet mode; (2), coating metal films on the surfaces, uncovered by the ink protective layer, of the indium tin oxide electrodes; (3), removing ink on the surfaces of the electrodes by the aid of a physical stripping process or a chemical stripping process, and covering the surface of each treated electrode with a latticed gold-plated layer jto enable the indium tin oxide electrodes to be high in surface adhesion property and electroconductivity; (4), fixing capture probe molecules to the surfaces of the modified electrodes in a physical adsorption manner or chemical coupling manner. The method has the advantages that the bonding strength of the electrodes and the probe molecules can be improved while the transparency and the electroconductivity of the indium tin oxide electrodes are guaranteed, surface hydrolysis of the electrodes can be resisted, and the stability of the electrodes can be improved.

Description

technical field [0001] The invention relates to a method for modifying an indium tin oxide (Indium Tin Oxide, ITO) conductive glass electrode in the technical field of electrochemiluminescent biological detection. Background technique [0002] Electrochemiluminescence (electrochemiluminescence) is a kind of chemiluminescence phenomenon produced in electrochemical reaction. Due to the characteristics of good reagent stability, high sensitivity, and wide linear range, the application of electrochemiluminescence detection technology developed by the principle of electrochemiluminescence in biological and medical analysis has rapidly aroused great research interest. [0003] Chemiluminescence is the phenomenon of luminescence produced during chemical reactions. During the chemical reaction, the molecule undergoes a so-called "energy transition" due to the absorption of the energy released by the chemical reaction, from the ground state to an unstable excited state. Chemilumine...

Claims

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Application Information

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IPC IPC(8): G01N27/36
Inventor 彭梓朱金国吴志鹏
Owner 彭梓
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