Nano flower-shaped ultramicro gold electrode and preparation and application thereof

A gold electrode and flower-like technology, applied in the research field, can solve the problems of hindering the popularization and application of gold ultra-micro electrodes, high requirements on instruments and equipment, and large substrate volume, and achieves low cost, simple preparation method, and small size. Effect

Active Publication Date: 2016-08-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large volume of the substrate, this microelectrode may be limited in practical applications
4. Deposit gold after chemical etching on mechanically drawn platinum nano-electrode to make nano-gold flower electrode (Anal. Chem., 2014, 86, 2849-2852), but this method requires high equipment and cost
Due to their limitations, these preparation methods have hindered the promotion and application of gold ultramicroelectrodes in various fields to a certain extent.

Method used

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  • Nano flower-shaped ultramicro gold electrode and preparation and application thereof
  • Nano flower-shaped ultramicro gold electrode and preparation and application thereof
  • Nano flower-shaped ultramicro gold electrode and preparation and application thereof

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Effect test

Embodiment 1

[0046] figure 1 It is a schematic diagram of the preparation of the nanoflower-shaped ultrafine gold electrode of the present invention. In this embodiment, the preparation process for preparing nano-flower-shaped ultrafine gold electrodes is as follows:

[0047] Step 1: Cut the 7μm carbon fiber 4 into short sections with a length of 1.5cm to 2cm, ultrasonically clean it with acetone, ethanol and ultrapure water for 3 minutes, then wash it with ultrapure water for 3 times, and dry it in a 37°C thermostat . Cut a copper wire 1 with a length of about 10 cm, and use graphite conductive glue 5 to adhere it to the cleaned and dried carbon fiber 4 .

[0048] Step 2: Draw one end of the glass capillary 2 with a diameter of 0.8 mm to a tip inner diameter of about 50 μm, and use a copper wire 1 bonded with carbon fiber 4 to penetrate through the thicker end of the glass capillary 2, exposing the tip of about 0.5 mm.

[0049] Step 3: The tail of the glass capillary 2 is sealed with e...

Embodiment 2

[0060] In this embodiment, the preparation process for preparing nano-flower-shaped ultrafine gold electrodes is as follows:

[0061] Step 1: Cut the 7μm carbon fiber 4 into short sections with a length of 1.5cm to 2cm, ultrasonically clean it with acetone, ethanol and ultrapure water for 3 minutes, then wash it with ultrapure water for 5 times, and dry it in a 37°C thermostat . Cut a copper wire 1 with a length of about 8 cm, and use graphite conductive glue 5 to adhere it to the cleaned and dried carbon fiber 4 .

[0062] Step 2: Draw one end of the glass capillary 2 with a diameter of 1.5 mm to a tip inner diameter of about 100 μm, and use a copper wire 1 bonded with carbon fiber 4 to penetrate through the thicker end of the glass capillary 2, exposing the tip of about 0.5 mm.

[0063] Step 3: The tail of the glass capillary 2 is sealed with epoxy resin 3 .

[0064] Step 4: After melting and sealing the tip of the capillary 2 with an alcohol lamp, continue to flame-etch t...

Embodiment 3

[0069] In this embodiment, the preparation process for preparing nano-flower-shaped ultrafine gold electrodes is as follows:

[0070] Step 1: Cut the 7μm carbon fiber 4 into short sections with a length of 1.5cm to 2cm, ultrasonically clean it with acetone, ethanol and ultrapure water for 3 minutes, then wash it with ultrapure water for 3 times, and dry it in a 37°C thermostat . Cut a copper wire 1 with a length of about 10 cm, and use graphite conductive glue 5 to adhere it to the cleaned and dried carbon fiber 4 .

[0071] Step 2: Draw one end of the glass capillary 2 with a diameter of 0.8 mm to a tip inner diameter of about 50 μm, and use a copper wire 1 bonded with carbon fiber 4 to penetrate through the thicker end of the glass capillary 2, exposing the tip of about 0.5 mm.

[0072] Step 3: The tail of the glass capillary 2 is sealed with epoxy resin 3 .

[0073] Step 4: After melting and sealing the tip of the capillary 2 with an alcohol lamp, continue to flame-etch t...

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Abstract

The invention belongs to the fields of preparation method and application of microelectrodes, and provides a nano flower-shaped ultramicro gold electrode and a preparation method and an application thereof. Micro carbon fibers and copper wires are adhered by a graphite conductive adhesive and then extend into a glass capillary tube with an end part stretched, and flame etching is performed to obtain a nanoscale diameter; the surface is subjected to electrochemical deposition with an electrophoretic paint, and heating and baking treatment is performed; in an acidic chloroauric acid solution, the nano flower-shaped ultramicro gold electrode is obtained by electrochemical deposition of gold. The surface of the prepared electrode is assembled with biological molecules marked with an electrochemical active substance, a receptor of the surface of a target molecule can be specifically recognized, and the target molecule is detected by an electrochemical method. The electrode can be applied in the research fields of biological sensors, biological molecular detection and the like. The preparation method has the advantages of simpliness, low cost, small size and easy operation; and the surface of the prepared gold electrode is clean, the specific surface area of the ultramicro electrode is increased, and an electrochemical signal is enhanced.

Description

technical field [0001] The invention belongs to the field of preparation methods and applications of microelectrodes, and relates to a preparation method of ultrafine gold electrodes, which can be applied to research fields such as biosensors and biomolecular detection. Background technique [0002] Microelectrode is one of the important branches of modern electrochemistry, which has high advantages in trace detection, single cell detection and biosensing. Ultra-microelectrodes have extremely small dimensions, and their diameters can reach micron or even nanoscale. They are an advantageous means for exploring the properties of microscopic substances, and can also be used for real-time detection of neurotransmitter information. In addition, ultramicroelectrodes have high current density, low RC constant, and fast mass transfer rate. These excellent characteristics make ultramicroelectrodes have fast response speed and high signal-to-noise ratio. Based on the above advantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00G01N27/308G01N27/48
Inventor 樊春海朱丹汪联辉晁洁苏邵张池
Owner NANJING UNIV OF POSTS & TELECOMM
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