Preparing method of micro disk array electrode

An array electrode and microdisk technology, applied in the field of microdisk array electrode preparation, can solve the problems of losing the excellent characteristics of the microelectrode, complicated preparation method and high cost, and achieve the effects of avoiding the overlap of capacitance and diffusion, simple operation and low cost.

Inactive Publication Date: 2004-11-10
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned several preparation methods are relatively complicated, and generally speaking, there are the following disadvantages: special precision instruments are required, the cost is high, and it is difficult to prepare in ordinary laboratories; the electrode materials are randomly distributed in the sealing material, and the electrochemical It is easy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Fabrication of Platinum Microdisk Linear Array Electrodes. In a laboratory environment, insert a Pt wire with a diameter of about 20 microns into a quartz capillary with an outer diameter of 320 microns, fix 12 quartz capillaries inserted with Pt wires into a straight line with a template, and put them into a glass tube. One end of the Pt wire Use copper wires to connect and lead out with silver conductive glue, and inject epoxy glue into the other end for encapsulation, and leave it at room temperature to cure for 12 hours. The cured microdisk Pt array electrodes were successively coated on coarse sandpaper and 1, 0.3, 0.05 μm α-Al 2 o 3 Grinding and polishing, and then in 5mmol / L Fe(CN) 6 3- Cyclic voltammetry is done in aqueous solution, the supporting electrolyte is 1mol / L KCL, the potential range is 0.6-0V, the scan rate is 0.01V / s, and the cyclic voltammogram is a standard S-shape, indicating that the preparation of the microdisk array electrode is successful....

Embodiment 2

[0018] Preparation of Platinum Microdisk Square Array Electrodes. In a laboratory environment, a Pt wire with a diameter of about 20 microns is inserted into a quartz capillary with an outer diameter of 320 microns, and 16 quartz capillaries inserted with Pt wires are fixed into a square with a template and placed in a glass tube. One end of the Pt wire Use copper wires to connect and lead out with silver conductive glue, and inject epoxy glue into the other end for encapsulation, and leave it at room temperature to cure for 12 hours. The cured microdisk Pt array electrodes were successively coated on coarse sandpaper and 1, 0.3, 0.05 μm α-Al 2 o 3 Grinding and polishing, and then in 5mmol / L Fe(CN) 6 3- Cyclic voltammetry is done in aqueous solution, the supporting electrolyte is 1mol / L KCL, the potential range is 0.6-0V, the scan rate is 0.01V / s, and the cyclic voltammogram is a standard S-shape, indicating that the preparation of the microdisk array electrode is successf...

Embodiment 3

[0020] Fabrication of carbon fiber microdisk disc-shaped array electrodes. In a laboratory environment, carbon fibers with a diameter of about 20 microns are inserted into a quartz capillary with an outer diameter of 320 microns, and 16 quartz capillaries inserted with carbon fibers are fixed into a disc shape with a template and placed in a glass tube. One end of the carbon fiber is covered with copper The wires are connected with silver conductive glue, and the other end is injected with epoxy glue for encapsulation, and left to cure at room temperature for 12 hours. The cured carbon fiber microdisk array electrodes were successively placed on coarse sandpaper and 1, 0.3, 0.05 μm α-Al 2 o 3 Grinding and polishing, and then in 5mmol / L Fe(CN) 6 3- Cyclic voltammetry is done in aqueous solution, the supporting electrolyte is 1mol / L KCL, the potential range is 0.6-0V, the scan rate is 0.01V / s, and the cyclic voltammogram is a standard S-shape, indicating that the preparation ...

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Abstract

The invention is a method of preparing microdisc array, adopting 4 steps: firstly inserting micron or nano fiber electrode material in quartz capillaries, then placing these capillaries in different shaped templates and fixing them into electrode array with different appearance on the surface. Inserting the template in the glass tube, one end of the electrode material is connected and led out by copper wires using Ag conductive glue, and the other end is injected with epoxy glue and packaged, and placing and solidifying the electrode array at room temperature. Placing the solidified microdisc array electrodes in sequence on the rough sand paper and 1.5, 0.5, and 0.03 mum alpha -Al2O3 for smoothing and polishing, then making circulating volt-ampere in the Fe(CN)63- water solution at 5mmol/L, where the supporting electrolyte is KCl at 1mol/L, the potential range is 0.6-0v, and the scanning speed is 0.01V/s and if the circulating volt-ampere graph is S-shaped, it shows that the microdisc array electrodes are successful.

Description

technical field [0001] The invention belongs to a preparation method of a microdisk array electrode. Background technique [0002] Microelectrode refers to a type of electrode whose one-dimensional size is micron or nanoscale. When the one-dimensional size of the electrode is reduced from millimeters to microns, it exhibits many excellent electrochemical properties different from conventional electrodes: microelectrodes inherent The small RC time constant allows it to be used to study fast, transient electrochemical reactions; the small polarization current on the microelectrode reduces the IR drop of the system, making it suitable for use in high-resistance systems, including Low supporting electrolyte concentration or even no supporting electrolyte solution, gas phase system, semi-solid and all-solid systems, these characteristics provide a powerful means for people to explore the microstructure of substances. According to the different electrode geometry, microelectrodes...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30
Inventor 董绍俊赵峰王鸣魁
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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