Method for preparing reconfigurable ultra-microelectrode with controllable morphology based on magnetic field driving

An ultra-micro electrode, magnetic field driven technology, applied in the direction of measuring electricity, measuring electrical variables, material electrochemical variables, etc., can solve the problems of low resolution and poor repeatability of electrode patterns, and achieves low cost, simple manufacturing method, and equipment. simple structure

Active Publication Date: 2019-09-20
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can only prepare disk-shaped or spherical ultramicroelectrodes with fixed shapes, and the prepared electrode patterns have low resolution and poor repeatability.

Method used

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  • Method for preparing reconfigurable ultra-microelectrode with controllable morphology based on magnetic field driving
  • Method for preparing reconfigurable ultra-microelectrode with controllable morphology based on magnetic field driving
  • Method for preparing reconfigurable ultra-microelectrode with controllable morphology based on magnetic field driving

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, a method for preparing a reconfigurable ultramicroelectrode with controllable morphology based on magnetic field drive, comprising the following steps:

[0026] 1) Referring to Figure 1(a), Figure 1(b) and Figure 1(c), a substrate 1 and a reservoir 2 with a micron groove array are prepared, and a groove array is prepared on the surface of a silicon substrate through a photolithography process to obtain Substrate 1, groove diameter D=5 μm, groove spacing L=10 μm, groove depth H=1 μm;

[0027] 2) Melt 50 μg of 34Bi-66In alloy in an environment of 80°C, add 5 μg of iron powder with a particle size of 100-500nm after it is completely melted, stir evenly, and then vacuum treat it for use;

[0028] 3) Preparation of reconfigurable ultramicroelectrodes 5 with controllable morphology: Referring to Figure 2(a) and Figure 2(b), in an environment of 90°C, first place the substrate 1 in the liquid storage tank 2, A hydrochloric acid solution with a volume concentrati...

Embodiment 2

[0032] Embodiment 2, a method for preparing a shape-controllable reconfigurable ultramicroelectrode based on magnetic field drive, comprising the following steps:

[0033] 1) Referring to Figure 1(a), Figure 1(b) and Figure 1(c), prepare a substrate 1 and a reservoir 2 with a micron groove array, prepare a groove array on the surface of the silicon substrate to obtain a substrate 1, groove Diameter D=10μm, groove spacing L=20μm, groove depth H=3μm;

[0034] 2) Melt 50 μg of 34Bi-66In alloy in an environment of 80°C, add 10 μg of iron powder with a particle size of 100-500 nm after it is completely melted, stir evenly, and then vacuum treat it for use;

[0035] 3) Preparation of reconfigurable ultramicroelectrodes 5 with controllable morphology: Referring to Figure 2(a) and Figure 2(b), in an environment of 90°C, first place the substrate 1 in the liquid storage tank 2, A hydrochloric acid solution with a volume concentration of 17% is added to the tank 2, and a liquid eutecti...

Embodiment 3

[0039] Embodiment 3, a method for preparing a reconfigurable ultramicroelectrode with controllable morphology based on magnetic field drive, comprising the following steps:

[0040] 1) Referring to Figure 1(a), Figure 1(b) and Figure 1(c), prepare a substrate 1 and a reservoir 2 with a micron groove array, prepare a groove array on the surface of the silicon substrate to obtain a substrate 1, groove Diameter D=20μm, groove spacing L=40μm, groove depth H=5μm;

[0041] 2) Melt 100 μg of 34Bi-66In alloy in an environment of 80 ° C, add 30 μg of iron powder with a particle size of 100-500 nm after it is completely melted, stir evenly, and then vacuum treat it for use;

[0042]3) Preparation of reconfigurable ultramicroelectrodes 5 with controllable morphology: Referring to Figure 2(a) and Figure 2(b), in an environment of 90°C, first place the substrate 1 in the liquid storage tank 2, A hydrochloric acid solution with a volume concentration of 20% is added to the tank 2, and a li...

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Abstract

Provided in the invention is a method for preparing a reconfigurable ultra-microelectrode with the controllable morphology based on magnetic field driving. A substrate with a micro-meter-groove array and a liquid storage tank are prepared; a low-melting alloy material is selected as an electrode material and iron powder is added; the substrate is placed in the liquid storage tank, a hydrochloric acid solution is added into the liquid storage tank, and liquid low-melting alloy is injected into the groove of the substrate; a motion control platform controls a permanent magnet to rise to be in contact with the liquid storage tank, the permanent magnet is aligned at a low-melting alloy droplet, the permanent magnet moves according to a pre-designed electrode pattern, and the low-melting alloy droplet is driven by the permanent magnet to make an electrode pattern; the substrate is taken out from the liquid storage tank and cooling is performed to obtain a reconfigurable ultra-microelectrode with the controllable morphology; and the reconfigurable ultra-microelectrode is heated, the reconfigurable ultra-micro electrode is melted, and the low-melting alloy droplet is sucked up from the substrate by the permanent magnet to complete reconstruction of the low-melting-alloy reconfigurable ultra-microelectrode. According to the invention, an electrode having a complicated pattern shape can be made; the preparation method is simple; and the electrode material can be recycled.

Description

technical field [0001] The invention belongs to the technical field of ultramicroelectrode preparation, in particular to a method for preparing a shape-controllable reconfigurable ultramicroelectrode based on magnetic field driving. Background technique [0002] Ultramicro electrode refers to a microelectrode with a one-dimensional size of less than 25 microns. With its micron or nanoscale scale, ultramicro electrodes exhibit many excellent characteristics different from conventional electrodes, such as fast mass transfer rate and high current density. Due to the many excellent properties of ultramicroelectrodes, they have broad prospects in single-cell analysis, electrochemical biosensing, and electrocatalysis. [0003] With the development of micro-nano manufacturing technology, more and more lightweight, miniaturized and flexible wearable electronic devices have been researched and developed. In these micro-nano electronic devices, electrical Interconnection, ultra-micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01R31/00G01R31/02C22C28/00
CPCG01N27/30G01R31/00C22C28/00G01R31/50
Inventor 雷彪刘红忠张鸿健叶国永牛东蒋维涛蔡崇文张煜昊
Owner XI AN JIAOTONG UNIV
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