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Integrated electrochemical electrode system based on nanometer channel array surface carbon/platinum jet-plating

A nano-channel and electrode system technology, applied in the field of electrochemistry, can solve the problems of large volume and unfavorable low-concentration analyte detection, and achieve the effects of small volume, simple production and small usage amount.

Inactive Publication Date: 2018-12-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In short, in conventional two-electrode, three-electrode, and four-electrode test systems, the electrodes are separated from the nanochannel and contain an electrolytic cell; these two characteristics lead to a large overall test environment for conventional electrode test systems, which is not conducive to low-concentration Analyte detection

Method used

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  • Integrated electrochemical electrode system based on nanometer channel array surface carbon/platinum jet-plating
  • Integrated electrochemical electrode system based on nanometer channel array surface carbon/platinum jet-plating
  • Integrated electrochemical electrode system based on nanometer channel array surface carbon/platinum jet-plating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this example, the conventional electrolyte solution used was 0.1M phosphate buffered saline. The C-AAO-Pt electrode sheet in the new electrode system is immersed in the electrolyte solution, and the working electrode of the electrochemical workstation is connected to the wire of the carbon layer on the electrode, and the reference electrode and the counter electrode are connected to the wire of the platinum layer on the electrode to form a double-electrode system , for electrochemical tests, the test results are as follows Figure 7 dashed curve.

[0055] Immerse a rod-shaped commercial glassy carbon electrode and a rod-shaped commercial platinum electrode into the electrolyte solution. The electrode is connected to the reference electrode and the counter electrode of the electrochemical workstation to form a two-electrode system. The same electrochemical test as the C-AAO-Pt electrode is carried out. The test results are as follows: Figure 7 the solid curve.

[...

Embodiment 2

[0059] In this example, the conventional electrolyte solution used was 1 mM potassium ferrocyanide / potassium ferricyanide (an inorganic redox couple) solution. The mode of electrochemical signal measurement is as embodiment 1, and electrochemical test result is as follows Figure 8 As shown, the dotted line curve in the figure is the test result of the C-AAO-Pt electrode system, and the solid line curve is the test result of the commercial glassy carbon electrode / platinum electrode.

[0060] Figure 8 A represents the CV curve, the specific measurement parameters: the scanning voltage is -1V ~ 1V and -0.4V ~ 0.4V respectively, and the scanning rate is 0.1V / s; Figure 8 B represents the EIS curve, Figure 8 What C represented was the i-t curve, and the specific measurement parameters were all the same as in Example 1. From Figure 8 It can be seen in A that both the C-AAO-Pt electrode system and the commercial glassy carbon electrode / platinum electrode can successfully char...

Embodiment 3

[0063] In this example, the conventional electrolyte solution used was a 5 mM solution of p-benzoquinone (a classic redox organic). The mode of electrochemical signal measurement is as embodiment 1, and electrochemical test result is as follows Figure 9 shown.

[0064] The dotted line curve in the figure is the test result of the C-AAO-Pt electrode system, and the solid line curve is the test result of the commercial glassy carbon electrode / platinum electrode. Figure 9 A represents the CV curve, the specific measurement parameters: the scanning voltage is -1.5V ~ 1.5V, and the scanning rate is 0.1V / s; Figure 9 What B represents is EIS curve, and concrete measurement parameter is identical with embodiment 1; Figure 9 C represents the i-t curve, the specific measurement parameters: the initial voltage is -0.8V, and the test time is 600s. From Figure 9 A It can be seen that both the C-AAO-Pt electrode system and the rod-shaped commercial glassy carbon electrode / platinum ...

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Abstract

The invention discloses an integrated electrochemical electrode system based on nanometer channel array surface carbon / platinum jet-plating. An anodic alumina nanochannel array is used as a carrier, and one surface of the anodic alumina nanochannel array is jet-plated with a carbon layer by using a vacuum vapor deposition method, and the other surface of the anodic alumina nanochannel array is jet-plated with a platinum layer by using an ion sputtering method; then, the anodic alumina nanochannel array is connected to an electrochemical workstation system by using a conducting wire, the carbonlayer at a certain side of an AAO is used as a working electrode, and the platinum layer at the other side of the AAO is used as a reference electrode and a counter electrode, so that the electrode system is constructed. The electrode system disclosed by the invention is integrated with a nanometer channel and an electrode, has the functions of a conventional electrochemical system, is simple andconvenient to produce, small in size, portable and convenient to operate and has innovativeness and application prospects on the aspects of micro-nano analysis and detection.

Description

technical field [0001] The invention belongs to the field of electrochemistry based on nano-channels, in particular to an integrated electrochemical electrode system based on carbon / platinum spraying on the surface of nano-channel arrays. Background technique [0002] Nanochannels have an ordered structure, stable and good physical and chemical properties, and have been commercialized. These characteristics make them have great potential in the field of ultrasensitive single-molecule analysis and detection. Nanochannel-based detection technologies are also increasing. At present, detection methods using nanochannels can be mainly divided into electrochemical detection methods and optical detection methods. Among them, the electrochemical detection method is easy to operate and has high sensitivity, which is favored by many researchers. It is a commonly used analysis method to detect the transmembrane electrical signal of nanochannels by electrochemical testing method. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 傅迎春朱文越黎玉晴戴煌李延斌应义斌
Owner ZHEJIANG UNIV