A method for preparing metal homogenous and hybrid ultrafine electrodes by carbon template and electroplating

Abstract

The invention discloses a method for preparing metal hybrid and homogeneous ultramicro electrodes by using carbon template and electroplating method. The method can prepare single-tube ultrafine metal electrodes including gold, platinum, mercury, etc., and double-channel hybrid and homogeneous ultrafine metal electrodes with different (or the same) metal materials on both sides. Firstly, micro-nano-scale quartz double tubes are drawn according to the needs of the experiment, and then high-temperature cracking and deposition of butane is performed on the dual channels of the quartz tubes to prepare incompletely sealed carbon templates. Since no special attention to nitrogen protection is required, the method has greatly reduced requirements on operation and environment. On this basis, we inserted it into a metal electrolyte containing a certain concentration, determined the reduction potential and performed constant potential electroplating, and finally obtained various metal ultramicro electrodes with dense and flat filling tips. Since the outer wall is silanized, metal growth outside the tube is prevented. Electrochemical techniques and surface analysis techniques were used to characterize the prepared electrodes.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and in particular relates to a method for preparing ultra-micro homogeneous and hybrid electrodes by using a carbon template method and an electroplating method. Background technique [0002] Since the late 1970s, ultra-micro electrodes (UMEs, also known as micro-nano electrodes) have been introduced into the field of electroanalytical chemistry, which has led to revolutionary changes in the field. Not only can it be used to obtain kinetic parameters of electrochemical reactions, but its size characteristics enable many studies in biological systems that would otherwise be impossible. For example, ultrafine electrodes can be inserted into cells without destroying the physiological activity of cells, so as to dynamically monitor the changes inside cells in real time. However, the preparation of ultrafine electrodes is usually difficult, which cannot be mass-produced, and the repeatability of p...

AI Technical Summary

Problems solved by technology

However, ultramicroelectrodes are usually difficult to prepare, cannot be mass-produced, and the repeatability of preparation is poor, which seriously hinders their wide application.

And the traditional ultra-micro electrode is often a single electrode, which can only get a single signal, which also affects the application range of this type of electrode to a large extent.

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