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Preparation and screen printing method of a substrate material with highly active surface-enhanced Raman effect

A surface-enhanced Raman and substrate material technology, applied in printing, printing post-processing, printing devices, etc., can solve problems affecting the SERS effect, etc., and achieve the effect of clean synthesis method, simple reaction steps, and low price

Inactive Publication Date: 2016-04-13
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) effect and electromagnetic properties of metal materials, thus affecting its SERS effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Add 0.51g of silver nitrate, 0.27g of glucose, 1g of polyvinylpyrrolidone (PVP) and 0.0022g of carbonate into 30mL 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 a 0.5cm×0.5cm solid pattern 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 is poly...

Embodiment 2

[0021] 1) Add 5.1g of silver nitrate, 2.7g of glucose, 10g of polyvinylpyrrolidone (PVP) and 0.022g of carbonate into 300mL of water in sequence and stir for 10-20min. 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 is polyest...

Embodiment 3

[0023] 1) Add 0.8g of silver nitrate, 0.5g of glucose, 1g of polyvinylpyrrolidone (PVP) and 0.003g of carbonate into 30mL of water in sequence and stir for 10min. 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 polyester ...

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PUM

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Abstract

The invention provides a preparation and printing method of a base material with a highly active surface-enhanced Raman effect. Carbonates are introduced during the preparation of silver nanoparticles to make the obtained silver nanoparticles irregular, which is conducive to the generation of SERS hot spots , the synthesized silver nanoparticles were printed into a SERS substrate by screen printing. This method does not require product purification, is fast and intuitive, and is a new synthetic method with simple operation, fast speed and high yield. The detection limit of the surface-enhanced Raman effect (SERS) substrate manufactured by the invention can reach 10-10mol / L for the dye rhodamine 6G, and the price is low, which can replace and supplement the traditional expensive silicon substrate, and has a reaction step Simple, short reaction time, easy operation and other advantages, it can be used for industrial batch preparation and production, and can be applied to the detection of traditional dyes and harmful additives in food. The synthesis method is clean and environmentally friendly, and is suitable for popularization and application.

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 various fields such as chemistry, biology, and pharmacology. be widely used. 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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