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Precious-metal micro-nanometer structure and preparing method and application thereof

A micro-nano structure, precious metal technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of difficult control of metal structure, complex template printing process, complicated and time-consuming, etc. Adjustable performance, good enhanced activity, low cost effect

Inactive Publication Date: 2016-08-24
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the surface-enhanced Raman scattering substrate preparation technology of noble metal nanostructures includes preparing rough structures from silicon and aluminum and using them as templates to prepare nano-noble metal films, but this method is complex, time-consuming and difficult to adjust, and can also be prepared by polymers. Noble metal nanostructures are used as surface-enhanced Raman scattering substrates. For example, the substrate material is prepared by evaporating metal after embossing a pattern on a polymer material. In this method, the printing process of the template is also relatively complicated, and the metal structure is difficult to control At the nanoscale, the development of precious metal micro-nanostructures with simple process, controllable structure, and stronger Raman scattering enhancement activity is an important research direction at present.

Method used

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  • Precious-metal micro-nanometer structure and preparing method and application thereof
  • Precious-metal micro-nanometer structure and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] For the preparation method of gold micro-nanostructure, see figure 1 ,details as follows:

[0026] Preparation of shape-memory polymer film: Place a 2.5cm×7.6cm glass slide in anhydrous ethanol, ultrasonically clean it and dry it, and dissolve shape-memory polyurethane in N,N-dimethylacetamide to obtain a concentration of 150mg / mL solution, 2mL of the obtained solution is evenly coated on the cleaned glass slide to form a thin layer, put it in a vacuum oven at 90°C to dry, completely remove the solvent N,N-dimethylacetyl, and obtain a shape memory polymer For the film, the shape memory polymer film is cut according to 2.5cm×1cm, placed in anhydrous ethanol for ultrasonic cleaning, and then dried naturally to obtain a shape memory polymer film sample;

[0027] Preparation of gold micro-nanostructures: fix the shape memory polymer film sample on the fixture of the tensile machine, and adjust the ambient temperature to 85°C (at this temperature, the shape memory polyureth...

Embodiment 2

[0031] The preparation method of the gold micro-nano structure is as follows:

[0032] The shape-memory polymer film sample prepared in Example 1 was fixed on the clamp of the tensile machine, and the ambient temperature was adjusted to 85°C (at this temperature, the shape-memory polyurethane was in a high elastic state), and the shape-memory polymer film was stretched along the shape-memory polymer film with the tensile machine. The length direction of the sample is elongated by 10% (stretching rate is 5mm / min), which is 1.1 times of the original length, and the temperature is naturally cooled to room temperature. With the help of the shape memory effect of the shape memory polymer material, the shape memory polymer film sample remains stretched. The state after stretching remains unchanged;

[0033] Put the stretched shape-memory polymer film sample into the vacuum ion sputtering apparatus, and the vacuum degree is 5×10-4 Under the vacuum state of Pa, according to the deposi...

Embodiment 3

[0035] The preparation method of gold micro-nanostructure is as follows:

[0036] The shape-memory polymer film sample prepared in Example 1 was fixed on the clamp of the tensile machine, and the ambient temperature was adjusted to 85°C (at this temperature, the shape-memory polyurethane was in a high elastic state), and the shape-memory polymer film was stretched along the shape-memory polymer film with the tensile machine. The length direction of the sample is stretched by 20% (the stretching rate is 5mm / min), which is 1.2 times of the original length, and the temperature is naturally cooled to room temperature. With the help of the shape memory effect of the shape memory polymer material, the shape memory polymer film sample remains stretched. The state after stretching remains unchanged;

[0037] Put the stretched shape-memory polymer film sample into the vacuum ion sputtering apparatus, and the vacuum degree is 5×10 -4 Under the vacuum state of Pa, according to the depos...

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Abstract

The invention discloses a precious-metal micro-nanometer structure and a preparing method and application thereof. The preparing method includes the steps that a thermotropic shape-memory high-polymer material is dissolved to be coated and dried to obtain a shape-memory high-polymer film; at the specific temperature, the shape-memory high-polymer film is stretched 10% to 30%, the stretched shape-memory high-polymer film is naturally cooled to the room temperature, the shape-memory high-polymer film is kept the stretched state, a precious-metal nanometer particle layer is prepared on the surface of the stretched shape-memory high-polymer film, the product is put into the environment with the specific temperature, the stretched shape-memory high-polymer film is recovered to the original size in the stretched direction accordingly, and the precious-metal micro-nanometer structure is obtained. According to the preparing method, the precious-metal micro-nanometer structure with the special three-dimensional structure is prepared through the characteristic of the shape-memory high-polymer material, the prepared precious-metal micro-nanometer structure is used as a surface-enhanced-raman-scattering-spectroscopy active substrate, and the detection sensitivity can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of photoelectric analysis and detection, and relates to a precious metal micro-nano structure and its preparation method and application. technical background [0002] Surface-enhanced Raman scattering (SERS) can provide structural information of surface-adsorbed molecules such as gold, silver, and copper. This technology generates a strong electromagnetic field through plasmon resonance between noble metal substrates to amplify the Raman signal of the molecule and improve the detection sensitivity. The development of this technology is therefore strongly dependent on the development of active substrates. At present, the surface-enhanced Raman scattering substrate preparation technology of noble metal nanostructures includes preparing rough structures from silicon and aluminum and using them as templates to prepare nano-noble metal films, but this method is complex, time-consuming and difficult to adjust, an...

Claims

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Application Information

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IPC IPC(8): G01N21/65B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00G01N21/658
Inventor 易国斌黎志伟罗洪盛俎喜红
Owner GUANGDONG UNIV OF TECH
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