Preparing method of micro disk array electrode

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...

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 to cause the capacitance and diffusion overlap between adjacent electrodes during the test, resulting in the electrochemical behavior of the conventional large electrodes on the microdisk array electrodes, which loses the excellent characteristics of the microelectrodes; it is difficult to clean the electrode surface after each test. Poor reproducibility, cannot be reused