Electrochemical deposition preparation method for composite material used for microelectrode modification

A composite material and micro-electrode technology, applied in the direction of electrochemical variables of materials, material analysis by electromagnetic means, material analysis, etc., can solve the problems of non-conductivity, increase the AC impedance of PEDOT-GO, etc., and achieve excellent mechanical stability. and electrical conductivity, good biocompatibility, low cost effect

Inactive Publication Date: 2016-11-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since GO (graphene oxide) does not have the ability to conduct electricity, this also increases the AC impedance of PEDOT-GO

Method used

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  • Electrochemical deposition preparation method for composite material used for microelectrode modification
  • Electrochemical deposition preparation method for composite material used for microelectrode modification
  • Electrochemical deposition preparation method for composite material used for microelectrode modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Electrolyte preparation:

[0045] Measure 10 ml of 2 mg / ml GO aqueous solution (XFNANO) with a graduated cylinder, and then dilute it 20 times with deionized water to obtain 0.1 mg / ml GO aqueous solution. Use a graduated cylinder to measure 60ml of the diluted solution into a 100ml beaker and ultrasonically disperse it for 30min to obtain the following: figure 1 The graphene oxide aqueous solution shown in a.

[0046] Weigh 0.01g (1mM / L) ascorbic acid with micro balance and add to figure 1 The solution in a was then stirred until it was completely dissolved. Use a dropper to drop an appropriate amount of ammonia water into the solution so that the pH of the solution is between 9-10. Adjust the temperature of the oil bath heating pot to 95°C and keep the temperature constant for more than 10 minutes. Subsequently, the beaker was sealed with aluminum foil and placed in an oil bath for heating, the rotating speed of the magnetic stirrer was adjusted to 700rpm and timin...

Embodiment 2

[0054] Electrolyte preparation:

[0055] Measure the GO aqueous solution of 60ml 2mg / ml into the beaker of 100ml with graduated cylinder and ultrasonically disperse 30min to obtain such as figure 1 The graphene oxide aqueous solution shown in a.

[0056] Weigh 0.2g (20mM / L) ascorbic acid with micro balance and add to figure 1 The solution in a was then stirred until it was completely dissolved. Use a dropper to drop an appropriate amount of ammonia water into the solution so that the pH of the solution is between 9-10. Adjust the temperature of the oil bath heating pot to 95°C and keep the temperature constant for more than 10 minutes. Subsequently, the beaker was sealed with aluminum foil and placed in an oil bath for heating, the rotating speed of the magnetic stirrer was adjusted to 700rpm and timing was started. After reacting for 20min, the beaker was taken out and cooled at room temperature to obtain the following figure 1 rGO aqueous solution shown in b.

[0057] ...

Embodiment 3

[0063] Electrolyte preparation:

[0064] Measure the GO aqueous solution of 60ml 2mg / ml into the beaker of 100ml with graduated cylinder and ultrasonically disperse 30min to obtain such as figure 1 The graphene oxide aqueous solution shown in a.

[0065] Weigh 1.2g (20mg / ml) ascorbic acid with micro balance and add to figure 1 The solution in a was then stirred until it was completely dissolved. Subsequently, the beaker was sealed with aluminum foil and stirred vigorously on a magnetic stirrer. After reacting at room temperature for 24 hours, the following figure 1 rGO aqueous solution shown in b.

[0066] Towards figure 1 Add 0.3g PSS (5mg / ml) to the rGO solution shown in b and stir to dissolve to obtain figure 1 The mixed solution shown in c.

[0067] with a pipette figure 1 Add 60 μL (0.01M / L) of EDOT monomer to the mixed solution shown in c, then stir for more than 2 hours until it is completely dissolved, and prepare the following figure 1 The mixed solution show...

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Abstract

The invention discloses an electrochemical deposition preparation method for a composite material used for microelectrode modification. The method comprises the following steps: subjecting graphene oxide (GO) to chemical reduction by using a reducing agent; then adding counter ions as a stabilizing agent for a reduced graphene oxide (rGO) solution and as counter ions for polymerization of conductive polymer monomer; and depositing the conductive polymer and graphene onto the surface of an electrode by using an electrochemical process. After polymerization, the monomer, the counter ions and rGO are deposited on the surface of the microelectrode through the action of ionic bonds. According to the invention, reduction and deposition of GO are separated, so reduction efficiency is improved and deposition is simplified; and after the biological microelectrode is modified by the composite material prepared in the invention, the alternating-current impedance of the microelectrode can be efficiently reduced, and charge storage capability of the microelectrode can be improved, so electric stimulation and electric recording performance of the biological microelectrode can be improved.

Description

technical field [0001] The present invention relates to electrode surface modification in the field of bioelectrodes, in particular, to a preparation method for electrochemical deposition of composite materials for micro-electrode modification, in which reduced graphene oxide is doped with conductive polymers by means of electrochemical deposition The substances are modified on the surface of microelectrode points. Background technique [0002] Nowadays, the diagnosis and treatment of diseases by using the electrophysiological recording and functional electrical stimulation functions of neural microelectrodes has attracted extensive attention. Researchers have achieved many clinical applications by using microelectrodes, such as alleviating Parkinson's syndrome through deep brain electrical stimulation, rehabilitation of paralyzed limbs through functional electrical stimulation, and restoration of hearing and vision through the use of cochlear implants and visual prostheses....

Claims

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Application Information

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IPC IPC(8): G01N27/327G01N27/30
CPCG01N27/308G01N27/327
Inventor 刘景全王明浩康晓洋吉博文杨斌陈翔王晓林杨春生
Owner SHANGHAI JIAO TONG UNIV
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