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Gold film covered high-density nano needle point array and application thereof

A high-density, array technology, applied in the direction of measuring devices, instruments, and material analysis through optical means, can solve the problems of difficult rapid trace detection of triphenylphosphine concentration, responsible preparation method, poor selectivity, etc. , to achieve the effect of clean surface, low cost and simple preparation method

Active Publication Date: 2017-08-29
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, the methods for detecting the concentration of triphenylphosphine mainly include gas chromatography, electrochemical method, etc., but these existing detection methods have disadvantages such as low sensitivity, poor selectivity, and long time-consuming, so it is difficult to realize the detection of triphenylphosphine. Rapid trace detection of phenylphosphine concentrations
Existing studies have found that noble metal nanoparticles (such as: gold nanoparticles, silver nanoparticles, etc.) have excellent plasmon effects and can produce strong surface-enhanced Raman effects, and the concentration based on surface-enhanced Raman effects The detection method has the advantages of high sensitivity, fast response, fingerprint effect, etc., and can provide molecular structure information adsorbed on the surface of noble metals, so it is expected to realize the rapid trace detection of the concentration of triphenylphosphine, but the surface-enhanced pull The substrate material of the Mann effect not only has a small structure area, poor uniformity, and low sensitivity, but also has a complicated preparation method and high cost

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  • Gold film covered high-density nano needle point array and application thereof
  • Gold film covered high-density nano needle point array and application thereof
  • Gold film covered high-density nano needle point array and application thereof

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preparation example Construction

[0030] A high-density nano needle tip array covered by a gold film, the preparation method of which comprises the following steps:

[0031] Step A, preparing a closely arranged single-layer polystyrene colloidal crystal array on a glass substrate, thereby obtaining a glass-substrate single-layer polystyrene colloidal crystal array.

[0032] Specifically, the preparation of a tightly arranged single-layer polystyrene colloidal crystal array on a glass substrate includes the following steps:

[0033] Step A1, put the glass substrate (for example: the glass substrate can be a glass sheet made of ordinary glass) into acetone, ethanol, the first mixed solution, and deionized water for ultrasonic cleaning, and then dry the cleaned glass substrate dry treatment, and then placed in an ultraviolet ozone cleaning machine for 10-40 minutes of irradiation, so as to obtain a glass substrate with a hydrophilic surface. Wherein, the first mixed liquid is formed by mixing concentrated sulfuric...

Embodiment 1

[0048] A high-density nano-tip array covered by a gold film is prepared by the following steps:

[0049] Step a, the glass substrate (the glass substrate is a common glass sheet) is put into acetone, ethanol, and the first mixed solution successively (the first mixed solution is composed of concentrated sulfuric acid with a mass concentration of 1.84g / ml and a mass concentration of 1.1g / ml ml of hydrogen peroxide according to the volume ratio of 3:1), ultrasonic cleaning in deionized water, ultrasonic cleaning in each liquid for 40 minutes, and then drying the cleaned glass substrate at a drying temperature of 120°C, The drying time is 20 minutes; after the water on the glass substrate is completely evaporated, place the glass substrate in an ultraviolet ozone cleaning machine for 10-40 minutes of irradiation, so as to obtain a glass substrate with a hydrophilic surface.

[0050] Step b, take 50 microliters of polystyrene colloidal sphere suspension (2.5wt.%) with a colloidal ...

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Abstract

The invention discloses a gold film covered high-density nano needle point array and application thereof. A preparation method of the gold film covered high-density nano needle point array comprises the following steps: preparing a glass substrate single-layer polystyrene colloidal crystal array; etching the glass substrate single-layer polystyrene colloidal crystal array by a reactive ion etching method; removing the single-layer polystyrene colloidal crystal array from the glass substrate to obtain a high-density nano needle point array; with the high-density nano needle point array as a template, depositing a layer of gold film with thickness of 10-50nm on the surface of the template by a physical deposition method to obtain a gold film covered high-density nano needle point array. The gold film covered high-density nano needle point array can be directly used as a substrate material of a surface-enhanced Raman scattering effect. The gold film covered high-density nano needle point array disclosed by the invention has the advantages of large structural area, high uniformity, clean surface and high detection sensitivity; moreover, the preparation method is simple and convenient to operate, low in cost and economical and environment-friendly.

Description

technical field [0001] The invention relates to the field of substrate materials for Surface-enhanced Raman spectroscopy (SERS), in particular to a high-density nano needle tip array covered by a gold film and its application. Background technique [0002] Triphenylphosphine (C18H15P) is not only an important basic raw material for rhodium phosphine and gold phosphine complex catalysts, but also can be used as a brightening agent for dyeing technology, an antioxidant for color film development, a stabilizer for polyepoxidation, and chemical analysis. Analytical reagents, so in the pharmaceutical industry, organic synthesis, chemical analysis and other fields have a wide range of applications. Since triphenylphosphine will pollute the environment and cause harm to the human body, it is necessary to perform on-site and rapid trace detection of the concentration of triphenylphosphine in many fields where triphenylphosphine is used. [0003] At present, the methods for detectin...

Claims

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 赵倩刘广强蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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