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A kind of unidirectional electrospinning three-dimensional Raman reinforced substrate and its preparation method and application

An electrospinning and three-dimensional Raman technology, which is applied in the field of unidirectional electrospinning three-dimensional Raman enhanced substrates and its preparation, can solve the problems of high cost, complicated process, and restrictions on mass production, and achieve improved stability and operation Simple, highly uniform results

Active Publication Date: 2021-07-20
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a lot of work mainly uses high-cost and complex lithography technology to realize the preparation of two-dimensional or three-dimensional Raman-enhanced substrates, which limits mass production.

Method used

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  • A kind of unidirectional electrospinning three-dimensional Raman reinforced substrate and its preparation method and application
  • A kind of unidirectional electrospinning three-dimensional Raman reinforced substrate and its preparation method and application
  • A kind of unidirectional electrospinning three-dimensional Raman reinforced substrate and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing a flexible polyvinyl alcohol@silver nanoparticle / silver nanoparticle unidirectional electrospinning three-dimensional Raman reinforced substrate, comprising the following preparation steps:

[0039] Preparation of silver colloid solution: put a clean flask into an oil pan, heat and set the temperature at 135°C; add 40mL of ethylene glycol; heat to 75°C, add 0.5g of PVP (55000); heat to 125°C, add 0.1g of silver nitrate; Constant temperature at 135°C for one hour; take it out and ice bath, then add 60mL acetone to precipitate, then centrifuge, pour out the supernatant and add deionized water for ultrasonication; repeat three times to obtain a silver colloid solution;

[0040] Prepare PVA aqueous solution: dissolve PVA powder in deionized water, stir at a temperature of 80°C for 6 hours to obtain a 15wt% PVA aqueous solution;

[0041] Preparation of electrospinning precursor solution: Mix PVA aqueous solution and silver colloid solution at a volume ...

Embodiment 2

[0047] A method for preparing a flexible polyvinyl alcohol@silver nanoparticle / silver nanoparticle unidirectional electrospinning three-dimensional Raman reinforced substrate, comprising the following preparation steps:

[0048] Preparation of silver colloid solution: put a clean flask into an oil pan, heat and set the temperature at 135°C; add 40mL of ethylene glycol; heat to 70°C, add 0.5g of PVP (55000); heat to 125°C, add 0.1g of silver nitrate; Constant temperature at 135°C for one hour; take it out and ice bath, then add 60mL acetone to precipitate, then centrifuge, pour out the supernatant and add deionized water for ultrasonication; repeat three times to obtain a silver colloid solution;

[0049] Prepare PVA aqueous solution: dissolve PVA powder in deionized water, stir at a temperature of 80°C for 6 hours to obtain a 15wt% PVA aqueous solution;

[0050] Preparation of electrospinning precursor solution: mix PVA aqueous solution and silver colloid solution at a volume ...

Embodiment 3

[0054] A method for preparing a flexible polyvinyl alcohol@silver nanoparticle / silver nanoparticle unidirectional electrospinning three-dimensional Raman reinforced substrate, comprising the following preparation steps:

[0055] Prepare the silver colloid solution: put the clean flask into the oil pan, set the heating temperature to 135°C; add 40mL of ethylene glycol; heat to 70-80°C, add 0.5g PVP (55000); heat to 125°C, add 0.1g silver nitrate ;Constant temperature at 135°C for one hour; take it out and ice bath, then add 60mL of acetone to precipitate, then centrifuge, pour out the supernatant and add deionized water for ultrasound; repeat three times to obtain a silver colloid solution;

[0056] Prepare PVA aqueous solution: dissolve PVA powder in deionized water, stir at a temperature of 80°C for 6 hours to obtain a 15wt% PVA aqueous solution;

[0057] Preparation of electrospinning precursor solution: Mix PVA aqueous solution and silver colloid solution at a volume ratio ...

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Abstract

The invention belongs to the technical field of optical detection materials, and relates to a unidirectional electrospinning three-dimensional Raman enhanced substrate and a preparation method and application thereof. From the inside to the outside, there are silver nanoparticles, PVA coating layer, and silver nanoparticles. The average particle size of the silver nanoparticles inside the PVA coating layer is 72nm, and the average particle size of the silver nanoparticles outside the PVA coating layer is 7nm. . The polyvinyl alcohol@silver nanoparticle spinning substrate was prepared by electrospinning, and the silver nanoparticles were deposited by thermal evaporation to obtain the polyvinyl alcohol@silver nanoparticle / silver nanoparticle Raman-enhanced substrate.

Description

technical field [0001] The invention belongs to the technical field of optical detection materials, and in particular relates to a unidirectional electrospinning three-dimensional Raman enhanced substrate and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Raman enhancement, a physical phenomenon, has attracted the attention of researchers in recent years because it can provide ultrasensitive and label-free chemical and biological analysis. Much effort has been made by researchers to improve the enhancement strength, sensitivity, and uniformity of Raman-enhanced substrates. Studies have shown that these indicators mainly depe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
Inventor 张超郁菁姜守振杨诚潘杰赵晓菲
Owner SHANDONG NORMAL UNIV