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Preparing method for figure controllable nanometer grade gold micro-strip electrode

A microstrip electrode, nano-scale technology, applied in the direction of material electrochemical variables, etc., can solve the problems that the electrode cannot be ground, the reproducibility is poor, and the surface is difficult to clean.

Inactive Publication Date: 2005-11-09
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is relatively simple and does not require expensive instruments, but it has the following disadvantages: the mica sheet is very thin and fragile, and the electrode is difficult to prepare; the electrode cannot be ground, the surface is difficult to clean, and the reproducibility is poor; the shape of the electrode is fixed, only is linear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Fabrication of wire-type nanoscale gold microstrip electrodes. Coat the polyamic acid solution on the mica and dry it in a drying oven at 80°C for 12 hours, then put it in a vacuum drying oven at 80°C, 100°C, 140°C, and 200°C for half an hour, then raise the temperature to 280°C Keep at ℃ for 4 hours to form a polyimide film, cool to room temperature, remove the polyimide film from the mica and deposit a layer of gold film. The thickness of the gold film measured by electron microscope is 36 nanometers. The polyimide of the gold film is cut into thin strips and inserted into the glass tube. The cross-sectional shape of the thin strips is controlled by a template to be linear. One end of the gold film is connected to the copper wire with silver conductive adhesive, and the other end is injected with epoxy glue to seal and cure for 12 hours. , first grind the cured microstrip electrode on the coarse sandpaper to remove the excess epoxy glue outside the glass tube to expos...

Embodiment 2

[0019] Fabrication of ring-shaped nanoscale gold microstrip electrodes. Coat the polyamic acid solution on the mica and dry it in a drying oven at 80°C for 12 hours, then put it in a vacuum drying oven at 80°C, 100°C, 140°C, and 200°C for half an hour, then raise the temperature to 280°C Keep at ℃ for 4 hours to form a polyimide film, cool to room temperature, peel off the polyimide film from the mica and deposit a layer of gold film. The thickness of the gold film is 56 nanometers as tested by electron microscopy. The polyimide with gold film is cut into thin strips and inserted into the glass tube. The cross-sectional shape of the thin strips is controlled by a template to be ring-shaped. One end of the gold film is connected to the copper wire with silver conductive adhesive, and the other end is injected with epoxy glue to seal and cure. Hours, the cured microstrip electrode firstly grinds off the excess epoxy glue outside the glass tube on coarse sandpaper to expose the e...

Embodiment 3

[0021] Fabrication of arc-shaped nanoscale gold microstrip electrodes. Coat the polyamic acid solution on the mica and dry it in a drying oven at 80°C for 12 hours, then put it in a vacuum drying oven at 80°C, 100°C, 140°C, and 200°C for half an hour, then raise the temperature to 280°C Keep at ℃ for 4 hours to form a polyimide film, cool to room temperature, peel off the polyimide film from the mica and deposit a layer of gold film. The thickness of the gold film is 56 nanometers as tested by electron microscopy. After the polyimide with gold film is cut into thin strips, the cross-sectional shape of the thin strips is controlled by a template to be arc-shaped. One end of the gold film is connected to the copper wire with silver conductive adhesive, and the other end is inserted into the glass tube, and epoxy glue is injected to seal and cure. After 12 hours, grind the cured microstrip electrode on the coarse sandpaper to remove the excess epoxy glue outside the glass tube to...

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Abstract

The invention is a nano gold microband electrode preparing method, coating polyamide acid solution on the mica, placing in vacuum dry box to make thermal cross-linking at 80 deg.C, 100 deg.C, 140 deg.C and 200 deg.C for 10-50 minutes, respectively, then raising tempetature to 260-300 deg.C and preserving heat for 2-8 hours to generate polyimide thin film, cooling to room temperature, then taking the polyimide thin film off the mica, plating a layer gold film on the thin film by evaporation, and the thickness of the gold film is tested by electron microscope; tailoring the polyimide thin film with gold film into the needed shape, inserting in the glass tube and fixing by templates, one end of the thin film 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 to solidify for 8-14 hours at room temperature. Firstly placing the gold microband electrode on the rough sand paper to grind off surplus epoxy glue outside the glass tube, to expose the surface of the electrode, then using gold-phase sand paper to smooth and polish the surface of the electrode, and washing by water twice. It can be used in actual electrochemical experiments.

Description

technical field [0001] The invention belongs to a preparation method of a shape-controllable nanoscale gold microstrip electrode. Background technique [0002] Microelectrode refers to a type of electrode whose one-dimensional size of the electrode is micron or nanoscale. When the one-dimensional size of the electrode is reduced from the millimeter level to the micron or nanometer level, it exhibits many excellent electrochemical properties different from conventional electrodes: The inherently small RC time constant of the microelectrode 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 high-resistance systems Among them, 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 micr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/36
Inventor 董绍俊赵峰王鸣魁陈红军
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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