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Method for producing gold nanoarray ultramicroelectrode

An ultra-micro electrode, gold nanotechnology, applied in the direction of material electrochemical variables, etc., can solve problems such as limiting the application of gold nanostructure arrays, and achieve the effects of low cost, low cost replacement, and simple and easy method.

Inactive Publication Date: 2014-03-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the survey results show that there is no report on the growth of gold nanostructure arrays by template-free, electroless deposition, and simple liquid-phase methods, which will greatly limit the application of gold nanostructure arrays in the development of high-performance ultramicroelectrodes.

Method used

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  • Method for producing gold nanoarray ultramicroelectrode
  • Method for producing gold nanoarray ultramicroelectrode
  • Method for producing gold nanoarray ultramicroelectrode

Examples

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Embodiment 1

[0021] A method for manufacturing gold nano-array ultramicroelectrodes, the method comprises the following steps:

[0022] (1) Add chloroauric acid to BMIM[PF 6 ] In the ionic liquid, control the concentration of chloroauric acid to be 10mmol / L, after dissolving, add formamide, after fully mixing with a vortex oscillator, this solution is transferred in the 10ml test tube, the oven temperature is adjusted to 95 degrees, and the reaction is 22 Remove after hours and let cool. The supernatant was poured out, and a red precipitate was obtained after several washes with acetone. Vacuum-dried to obtain a red product powder, which was stored in a desiccator.

[0023] The powder of the product can be redispersed into 99% ethanol or secondary water. After ultrasonically assisted dispersion, quickly use a 10μl pipette to pipette an appropriate amount of product dispersion, drop-coat it on a silicon wafer, and place it in a vacuum oven for Scanning electron microscopy characterizatio...

Embodiment 2

[0027] A method for manufacturing gold nano-array ultramicroelectrodes, the method comprises the following steps:

[0028] (1) Preparation of gold microsheets with gold nanocone arrays on the surface: adding chloroauric acid to BMIM[PF 6 ] in the ionic liquid, control the concentration of chloroauric acid to be 8mmol / L, after dissolving, add formamide, BMIM[PF 6 ] The volume ratio of ionic liquid to formamide is 0.9. After fully mixing with a vortex oscillator, transfer the solution into a 10ml test tube, place it in an oven, control the temperature at 90°C, and the reaction time is 24h. The supernatant was poured out, washed several times with acetone to obtain a red precipitate product, and dried in vacuum to obtain gold microsheets with gold nanocone arrays on the surface. Trident sampan-shaped gold nanocones, stored in a desiccator;

[0029] (2) Assembling and making of gold nanocone array ultramicroelectrodes: the gold microsheet with the gold nanocone array on the surf...

Embodiment 3

[0031] A method for manufacturing gold nano-array ultramicroelectrodes, the method comprises the following steps:

[0032] (1) Preparation of gold microsheets with gold nanocone arrays on the surface: adding chloroauric acid to BMIM[PF 6 ] in the ionic liquid, control the concentration of chloroauric acid to be 12mmol / L, after dissolving, add formamide, BMIM[PF 6] The volume ratio of the ionic liquid to formamide is 1.1. After fully mixing with a vortex oscillator, transfer the solution to a 10ml test tube, place it in an oven, control the temperature at 100°C, and take the reaction time for 20h. After cooling, the supernatant was poured out, washed several times with acetone to obtain a red precipitate product, and dried in vacuum to obtain gold microsheets with gold nanocone arrays on the surface. 100nm, trident-shaped gold nanocones stored in a desiccator;

[0033] (2) Assembly and manufacture of gold nanocone array ultramicroelectrodes: the gold microsheet with the gold ...

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Abstract

The invention relates to a method for producing a gold nanoarray ultramicroelectrode. A liquid-phase redox method is adopted to produce a gold microsheet as a sensitive probe of the ultramicroelectrode, a gold nanocone array is grown on the surface of the gold microsheet, and the produced gold microsheet with the gold nanocone array grown on the surface is fixedly stuck on the disk-shaped surface of the tip of a gold wire with the diameter of dozens of microns by silver conductive adhesive. After the gold wire is soldered on a copper wire, the gold wire and the copper wire are inserted into a drawn glass capillary tube, the end of the capillary tube, which is provided with the copper wire, is sealed by epoxy resin, the exposed copper wire serves as a lead of the working electrode, the end of the capillary tube, which is provided with the gold wire, is hermetically fused, and only a moderate size of gold wire is exposed. Compared with the prior art, the method for producing the gold nanoarray ultramicroelectrode is simple and practicable, the cost is low, moreover, the active end (the gold microsheet with the gold nanocone array secondary structure grown on the surface) can be conveniently replaced at low cost, and the gold nanoarray ultramicroelectrode is expected to be found applicable in trace substance detection, cell signal detection and other important fields.

Description

technical field [0001] The invention relates to a method for manufacturing an ultramicro electrode, in particular to a method for manufacturing an ultramicro electrode of a gold nanometer array. Background technique [0002] The extremely small electrode size of the ultramicroelectrode determines its unique working principle (such as nonlinear diffusion mode as the dominant factor) and its excellent electrochemical properties such as high mass transfer rate, small time constant, and low IR drop that cannot be compared with conventional electrodes. It has important application value in frontier fields such as miniature biosensors, trace substance detection, single-cell analysis, and single-molecule detection, so it is one of the frontier hotspots of electrochemical research in recent years. Since the development of ultra-micro-electrodes in the 1970s and 1980s, for a long period of time, the research on ultra-micro-electrodes has mainly focused on micro-electrodes, and relati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 秦瑶杨金虎李杰彭成信赵鹏郭方方包志豪
Owner TONGJI UNIV
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