Method for preparing gold-nano array electrode

An array electrode, gold nanotechnology, applied in the field of preparation of gold nanoarray electrodes, can solve the problem of no literature report

Inactive Publication Date: 2008-07-23
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no literature report on

Method used

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Embodiment 1

[0023] The invention uses polycarbonate filter membrane as a template to prepare gold nano array electrodes. The polycarbonate filter membrane is a commercially available product, and the gold nano-array electrode is prepared by the following steps:

[0024] First, fix the polycarbonate filter membrane on a non-metallic sheet with a certain strength, such as a paper sheet, and fix the paper sheet with a certain strength on the hole at the edge of the polycarbonate filter membrane. Make sure that the thin and soft polycarbonate membrane is not deformed during the drilling and fixing process. In the subsequent pre-treatment, electroless plating and post-treatment operations, use the paper sheet to ensure that the polycarbonate filter membrane is suspended in the solution, does not stick to the wall of the beaker, and fully contacts the solution.

[0025] Then proceed to electroless gold plating pretreatment. It needs to be sensitized and pre-plated with silver before electroless gol...

Embodiment 2

[0042] In the present invention, a polycarbonate filter membrane is used as a template, and the polycarbonate filter membrane is a commercial product, and the gold nano array electrode is prepared by the following steps:

[0043] (1) Fix the polycarbonate filter membrane on a cardboard with a certain strength to ensure that the polycarbonate filter membrane can be effectively suspended in the solution, not stick to the wall of the beaker, and fully contact the solution. The polycarbonate filter membrane was soaked and cleaned in methanol for 5 minutes, supplemented by ultrasonic vibration treatment.

[0044] (2) Put the polycarbonate filter membrane washed in methanol into SnCl 2 , CF 3 The sensitization pretreatment is carried out in the methanol and water mixture of COOH, the composition of the sensitization mixture is SnCl 2 0.1M, CF 3 COOH 0.1M, 1:1 (v / v) mixture of methanol and water, supplemented by ultrasonic treatment. The temperature is normal temperature and the time is ...

Embodiment 3

[0059] The present invention uses a polycarbonate filter membrane as a template, and the polycarbonate filter membrane is a commercially available product. First, fix the polycarbonate filter membrane on a plastic splint, and ensure that the thin and soft polycarbonate filter membrane does not deform during the clamping and fixing process. In the subsequent pretreatment, electroless plating and post-treatment operations, the plastic splint is used to ensure that the polycarbonate filter membrane is suspended in the solution, does not stick to the wall of the beaker, and fully contacts the solution. Then proceed to electroless gold plating pretreatment. It needs to be sensitized and pre-plated with silver before electroless gold plating. The specific process of preparing the gold nanoarray electrode is:

[0060] (1) Put the polycarbonate filter membrane fixed on the plastic splint into methanol for 5 minutes to soak for cleaning, supplemented by ultrasonic vibration treatment.

[0...

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Abstract

The invention relates to a preparation method of gold nanometer array electrode, which the substrate is polycarbonate filter membrane, after the processes of the pretreatment of chemical plating to the polycarbonate filter membrane, chemical plating, chemical plating after acid leaching, such as cleaning and processing, the former treatment, post acid leaching and rinsing, and assisted by the ultrasonic wave process in the steps of pretreatment, acid leaching and rinsing, using degreasing cotton soaked with dilute sodium cyanide to softly wipe the surface of the filter membrane after chemical plating, then rinsing with methanol, using the combined method of mechanical effect and chemical effect to effectively remove a gold layer on the surface to form the gold nanometer array, then pasting the filter membrane to the collector, assembling into the gold nanometer array electrode. The diameter of a single gold nanometer disk in the array is 10 to 100 nanometers measured by scanning electronic microscope, the component of the array group is pure gold measured with energy dispersive X-ray spectrum. The electrode has the advantages of high mass transfer speed, low double-layer charge current, effectively improving signal-to-noise ratio and the detection limit. The preparation method of gold nanometer array electrode has the advantages of ingenious design, simple operation and good reproduction.

Description

Technical field [0001] The invention relates to a method for preparing a nanometer electrode, in particular to a method for preparing a gold nanometer array electrode. Background technique [0002] Nanoelectrodes are a type of electrodes whose one-dimensional dimensions are nanopoles. Due to its small size, it has many advantages compared with conventional size electrodes: it can significantly increase the rate of mass transfer process, has very low electric double layer charging current, small time constant and IR drop, etc., which can greatly improve the measurement sensitivity And resolution, it can be used to study the fast electrochemical reaction mechanism that can not be studied by conventional electrodes. Due to the small size of the nanoelectrode, it is difficult to handle and operate a single nanoelectrode, and due to its small electrochemical response signal, more sensitive instruments are required. The nano-array electrode consists of thousands of single nano-electrod...

Claims

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Application Information

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IPC IPC(8): C23C18/06C23C18/42C30B29/02C30B7/14G01N27/30
Inventor 曹立新闫培生孙克宁
Owner HARBIN INST OF TECH AT WEIHAI
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