Method for preparing substrate material with high-activity surface-enhanced Raman scattering and silk-screen printing method

A technology of surface-enhanced Raman and substrate materials, applied in printing, post-processing of printing, printing devices, etc., can solve problems such as affecting the SERS effect, and achieve the effect of cleaning the synthesis method, improving the activity and detection limit, and simple reaction steps

Inactive Publication Date: 2014-11-05
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different shapes and structures will affect the surface plasmon resonance (SPR) effec

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Add 0.51 g of silver nitrate, 0.27 g of glucose, 1 g of polyvinylpyrrolidone (PVP) and 0.0022 g of carbonate into 30 mL of water in sequence and stir. Subsequently, the mixed solution was heated to 60 °C, and 0.3 mL of triethylamine was added through a peristaltic pump at a rate of 600 μL / min, and the reaction was continued for 20 min to collect insoluble matter. 2) Wash the insoluble matter collected in the previous step with ethanol for more than 3 times by centrifuging at 10,000 rpm for 10 minutes, then disperse it in 95 ethanol, and make its mass fraction reach 30%. Its viscosity is adjusted by ethylene glycol to make it suitable for screen printing. 3) Screen printing of silver nanoparticles. The specific method is: print the Ag nanoparticles prepared in the above steps into 0.5 cm×0.5 cm solid patterns or other patterns through a 300-mesh screen. 4) Dry the surface-enhanced Raman effect (SERS) substrate obtained by screen printing in an oven. If the substrate ...

Embodiment 2

[0024] 1) Add 5.1 g of silver nitrate, 2.7 g of glucose, 10 g of polyvinylpyrrolidone (PVP) and 0.022 g of carbonate into 300 mL of water in sequence and stir for 10 - 20 min. Subsequently, the mixed solution was heated to 60 °C, and 3 mL of triethylamine was added through a peristaltic pump at a rate of 600 μL / min, and the reaction was continued for 30 min to collect insoluble matter. 2) Wash the insoluble matter collected in the previous step with ethanol for more than 3 times by centrifuging at 10,000 rpm for 10 minutes, then disperse it in 95 ethanol, and make its mass fraction reach 30%. Its viscosity is adjusted by ethylene glycol to make it suitable for screen printing. 3) Screen printing of silver nanoparticles. The specific method is: print the Ag nanoparticles prepared in the above steps into a solid pattern of 0.3 cm×0.4 cm through a 400-mesh screen. 4) Dry the surface-enhanced Raman effect (SERS) substrate obtained by screen printing in an oven. If the substrate i...

Embodiment 3

[0027] 1) Add 0.8 g of silver nitrate, 0.5 g of glucose, 1 g of polyvinylpyrrolidone (PVP) and 0.003 g of carbonate into 30 mL of water in sequence and stir for 10 min. Subsequently, the mixed solution was heated to 60 °C, and 0.4 mL of triethylamine was added through a peristaltic pump at a rate of 600 μL / min, and the reaction was continued for 30 min to collect insoluble matter. 2) Wash the insoluble matter collected in the previous step with ethanol for more than 3 times by centrifuging at 10,000 rpm for 10 minutes, then disperse it in 95 ethanol, and make its mass fraction reach 40%. Its viscosity is adjusted by ethylene glycol to make it suitable for screen printing. 3) Screen printing of silver nanoparticles. The specific method is: print the Ag nanoparticles prepared in the above steps into a solid pattern of 0.3 cm×0.4 cm through a 350-mesh screen. 4) Dry the surface-enhanced Raman effect (SERS) substrate obtained by screen printing in an oven. If the substrate is pol...

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Abstract

The invention provides a method for preparing a substrate material with the high-activity surface-enhanced Raman scattering and a silk-screen printing method. According to the method for preparing the substrate material with the high-activity surface-enhanced Raman scattering, carbonate is introduced when silver nanoparticles are prepared, so that obtained silver nanoparticles are irregular, surface-enhanced Raman scattering (SERS) hot points can be generated easily, and the SERS substrate is formed by the synthesized silver nanoparticles in a printing mode. The method is free of product purification, high in preparing speed and visual and is a novel simple, rapid and high-yield synthesis method. According to the SERE substrate prepared with the method, the limit of detection to dye rhodamine 6G can reach 10 <-10> mol/L, the price is low, and traditional expensive silicon substrates can be replaced and supplemented. The method has the advantages that the reaction processes are simple, the reaction time is short, and operation is easy and convenient. The method can be used for industrialized batch preparation and production and can also be used for detection of traditional dye and detection of hazardous additives in food. According to the synthesis method, cleanness and environmental friendliness area achieved, and the method is suitable for application and popularization.

Description

Technical field [0001] The invention relates to the preparation and screen printing method of a base material with high active surface enhanced Raman effect. Background technique [0002] Surface-enhanced Raman Scattering (Surface-enhanced Raman Scattering) spectroscopy has the advantages of good selectivity and high sensitivity, and its sensitivity to certain molecules is millions of times higher than that of conventional Raman spectroscopy. It has been used in chemistry, biology, pharmacology, etc. Widely used in various fields. SERS is mainly an abnormal optical enhancement phenomenon of nanoscale rough surfaces or particle systems, which can amplify the Raman signals of molecules adsorbed on the surface of materials by about 10 6 times, for the substrate surface with special nanoparticle morphology distribution, the signal enhancement can even be as high as 10 14 times. The preparation of SERS substrate plays an important role in the development of SERS and is a resea...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00B41M1/12B41M7/00
Inventor 吴伟刘力戴志高肖湘衡蒋昌忠
Owner WUHAN UNIV
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