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Quick electrochemical electrode activating method

An activation method and electrochemical technology, which can be used in electrochemical variables of materials, scientific instruments, material analysis by electromagnetic means, etc., and can solve problems such as time-consuming and chip damage.

Inactive Publication Date: 2004-06-23
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is more suitable for the activation of rod-shaped electrode probes. It has certain limitations, such as time-consuming, damage to thin-film / thick-film electrodes, micro-reference electrodes integrated with micro-electrodes, and electrode array chips, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: figure 1 A flow block diagram showing the activation method of the electrochemical electrode 1 (thin film or thick film electrode 1a or electrode probe 1b) according to the embodiment of the present invention. This flow chart is used to explain the implementation of the present invention, not limited to describing the structure and parameters of the system / device. The quick activation method of the electrochemical electrode 1 is as follows: (1) Pre-cleaning: Rinse the surface of the electrode 1 with deionized water or ethanol cleaning solution 2, and dry it with the air flow 3 in the air gun to obtain a dry microelectrode 1; (2) Lofting: Put the electrode 1 into the plasma chamber 4, turn on the cooling water; (3) activation: turn on the power supply, and evacuate the plasma chamber 4 into a vacuum of 5 to 2×10 -2 Torr, the oxygen flow rate is set to 2L / min, the nitrogen pressure is 5psi, the radio frequency power is 70W, the base phase pressure is 30mTorr, ...

Embodiment 2

[0019] Example 2: figure 2 is a schematic diagram of a thin film or thick film electrode 1a activated using the present invention, image 3 yes figure 2 In the cross-sectional view of A-A', the thin film or thick film electrode 1a mainly includes the following parts: insulating material substrate 8, working electrode 9, insulating film 10, external plugging point or welding point 11 of the working electrode, counter electrode 12, counter electrode External plug points or welding points 13, reference electrode 14, external plug points or welding points 15 of the reference electrode. According to the present invention, according to figure 1 The steps shown activate the deactivated micro-film planar electrodes, Figure 4 It shows the comparison of the cyclic voltammogram before and after the rapid activation of the electrode. Before the activation, the surface of the electrode was polluted and deactivated, and the cyclic voltammogram i was flat. After activation, the surface...

Embodiment 3

[0020] Embodiment 3: according to the present invention, according to figure 1 The step shown activates the microelectrodes modified with platinum black particles on the surface of the deactivated thin film electrodes, Figure 5 It is a comparison of the cyclic voltammograms before and after the rapid activation of the electrode. Before the activation, the surface of the electrode was seriously polluted and deactivated, and its cyclic voltammogram i was flat without step changes. After activation, the surface of the electrode 1a was cleaned and activated, and its cyclic voltammogram ii was restored. Normal, the current output increased; the repeatability of the response after activation was tested and analyzed, and the half-wave potential in the cyclic voltammetry response after 8 activations was constant at 0.26V, and the mean peak value (Mean) of the oxidation current was 18nA. The standard deviation (Std.Dev) is 3nA, and the standard error (Std.Err) is 1nA, indicating that ...

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Abstract

The present invention relates to quick electrochemical electrode activating method. The device or chip with the electrode to be activated is first cleaned, then fed to a plasma chamber and vacuum pumped, and finally exposure activated in oxygen and nitrogen discharging atmosphere. The present invention describes the activating process of deactivated micro electrodes, including planar micro electrode, platinum black decoration electrode and micro electrode probe. The present invention has the advantages of simple operation, fast process and high repeatability, and is suitable for activation of electrochemical electrode in device and array chip, so that the present invention may find its wide application in the research and development of biological sensor, biochip and micro system integral chip.

Description

technical field [0001] The invention relates to a method for rapid activation of an electrochemical electrode, belonging to the fields of electrochemical detection technology, micro-electromechanical system (MEMS) processing technology and sensing technology. Background technique [0002] Various forms of electrochemical electrodes are widely used in biochemical analysis, health and quarantine, environmental monitoring, food testing, industrial fermentation production monitoring, etc. However, the electrode surface is often easily adsorbed by various impurities, including electroactive substances, which sometimes A thin film will be formed on the surface of the electrode, and this adsorption will inhibit the activity of the electrode and poison the electrode. Over time, impurities from the test solution or air are adsorbed on the surface of the electrochemical electrode, and its electrochemical response will change abnormally, which is called electrode deactivation. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/333G01N27/38
Inventor 蔡新霞王利
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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