Method for preparing working electrode of scanning electrochemical microscope

Abstract

The invention provides a method for preparing a working electrode of a scanning electrochemical microscope. The method for preparing the working electrode of the scanning electrochemical microscope is characterized in that by utilizing the characteristics of non-polarity and low melting point of paraffin, paraffin is used for manufacturing a paraffin mould with the inner diameter equal to the outer diameter of the working electrode in a pouring mode according to the size of standard the working electrode of the scanning electrochemical microscope provided by a manufacture factory; a sample to be tested is put in the center of the paraffin mould; a prepared liquid epoxy resin solution is poured into a gap between the paraffin mould and the sample to be tested; after an insulation layer material solution is solidified, namely insulation layer materials and the sample to be tested are melted into a whole, the sample to be tested with the insulation layer materials is pulled out, the operations of coarse grinding, fine grinding and fine polishing are carried out on the sample to be tested, the sample to be tested is cleaned with acetone and anhydrous ethanol and then is dried, and the working electrode of the scanning electrochemical microscope is obtained. Through the method for preparing the working electrode of the scanning electrochemical microscope, the working electrode which is the same as the standard electrode of the scanning electrochemical microscope in shape, size and dimension is prepared simply and rapidly.

Description

technical field [0001] The invention relates to a method for preparing a scanning electrochemical microscope working electrode. Background technique [0002] Scanning Electrochemical Microscopy (SECM) is a scanning probe microscopy technique proposed and developed by A.J. Bard's group in the late 1980s. It is based on the development of ultramicroelectrode (UME) in the late 1970s and the scanning tunneling microscope (STM) in the early 1980s. It is a new electrochemical on-site detection technology with a resolution between ordinary optical microscopes and STMs. Different from STM and atomic force microscopy (AFM) techniques, scanning electrochemical microscopy works on the basis of electrochemical principles, and can measure the electrochemical current given by the oxidation or reduction of substances in the micro-area. In addition to giving the topography of the sample surface, it can also Can provide a wealth of chemical information. [0003] Scanning Electrochemical Mi...

AI Technical Summary

Problems solved by technology

The above requirements not only greatly increase the difficulty and cost of experimenters in manufacturing working electrodes, but also reduce the efficiency of SECM

[0005] In addition, there is no public method for preparing the working electrode, and the experimenter can only rely on the manufacturer to complete the preparation of the working electrode.

[0006] Therefore, in order to solve the difficult problem of preparing the working electrode of the scanning electrochemical microscope, combined with the working principle and testing mechanism of the scanning electrochemical microscope, the operation mode and the structural characteristics of the instrument and equipment, the present invention proposes a method for preparing the electrolytic cell for the scanning electrochemical microscope. Grooved Working Electrode Method

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