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A kind of silver-plated optical fiber Raman probe and preparation method thereof

A fiber Raman, silver light technology, applied in Raman scattering, liquid chemical plating, coating and other directions, can solve the problems of complex preparation process, achieve the effects of simple control conditions, low preparation cost, and wide source of raw materials

Active Publication Date: 2022-06-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods all need step-by-step preparation and loading of silver particles, and the preparation process involved is complicated. Therefore, further exploration of surface-enhanced Raman scattering detection materials and their preparation process has important research and promotion significance.

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  • A kind of silver-plated optical fiber Raman probe and preparation method thereof
  • A kind of silver-plated optical fiber Raman probe and preparation method thereof
  • A kind of silver-plated optical fiber Raman probe and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] A silver-coated optical fiber Raman probe, the preparation method comprising the following steps:

[0036] 1) Optical fiber pretreatment: strip one end of the optical fiber with a coating layer of 2-5 cm long to expose the optical fiber cladding, cut the end face flat, ultrasonically clean it with acetone and distilled water in turn, and dry it in a 60°C oven for preservation;

[0037] 2) Configure the precursor solution: Dissolve silver nitrate and sodium bicarbonate in water and mix them evenly, configure a silver nitrate aqueous solution with a concentration of 0.067 mol / L and a sodium bicarbonate aqueous solution with a concentration of 0.04 mol / L, and add 30 mL of silver nitrate. Add polyvinylpyrrolidone to the solution, wherein the molar ratio of polyvinylpyrrolidone to silver nitrate is 8:1, after stirring and dissolving, after stirring evenly, adding 30 mL of sodium bicarbonate solution, and continuing to stir evenly to obtain a precursor solution;

[0038] 3) P...

Embodiment 2

[0044] A silver-coated optical fiber Raman probe, the preparation method comprising the following steps:

[0045] 1) Optical fiber pretreatment: strip one end of the optical fiber with a coating layer of 2-5 cm long to expose the optical fiber cladding, cut the end face flat, ultrasonically clean it with acetone and distilled water in turn, and dry it in a 60°C oven for preservation;

[0046] 2) Prepare the precursor solution: Dissolve silver nitrate and sodium bicarbonate in water respectively and mix them evenly, respectively prepare a silver nitrate aqueous solution with a concentration of 0.067 mol / L and an aqueous sodium bicarbonate solution with a concentration of 0.04 mol / L, and add 30 mL of nitric acid to the solution. Add polyvinylpyrrolidone to the silver solution, wherein the molar ratio of polyvinylpyrrolidone to silver nitrate is 8:1, after stirring and dissolving, after stirring evenly, adding 30 mL of sodium bicarbonate solution, and continuing to stir evenly to ...

Embodiment 3

[0052] A silver-coated optical fiber Raman probe, the preparation method comprising the following steps:

[0053] 1) Optical fiber pretreatment: strip one end of the optical fiber with a coating layer of 2-5 cm long to expose the optical fiber cladding, cut the end face flat, ultrasonically clean it with acetone and distilled water in turn, and dry it in a 60°C oven for preservation;

[0054] 2) Prepare the precursor solution: Dissolve silver nitrate and sodium bicarbonate in water respectively and mix them evenly, respectively prepare a silver nitrate aqueous solution with a concentration of 0.067 mol / L and an aqueous sodium bicarbonate solution with a concentration of 0.04 mol / L, and add 30 mL of nitric acid to the solution. Add cetyl ammonium bromide to the silver solution, wherein the molar ratio of cetyl ammonium bromide and silver nitrate is 8:1, after stirring and dissolving, after stirring evenly, add 30 mL of sodium bicarbonate solution, and continue to stir evenly to ...

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Abstract

The invention discloses a silver-plated optical fiber Raman probe and a preparation method thereof, belonging to the technical fields of medical treatment, food, chemical industry and environmental detection. The invention adopts a one-step solvothermal method, uses water or ethylene glycol as a solvent, immerses the optical fiber after simple pretreatment in Ag precursor solution to carry out solvothermal reaction, and obtains an optical fiber Raman probe loaded with Ag nanoparticles on the surface. The appearance and size of the silver nanoparticle prepared by the method are controllable and adjustable, the operation is simple, and the growth of the silver nanoparticle and its loading on the optical fiber can be completed in one step. Compared with the traditional Raman-enhanced substrate, the present invention fully combines the excellent surface-enhanced Raman scattering effect of silver nanoparticles and the light transmission effect of optical fibers, and further regulates the size and shape of the obtained silver nanoparticles. The obtained silver-coated optical fiber Mann probes show ultra-high sensitivity and selectivity for the detection of low-concentration substances, and can realize real-time detection in special environments such as harsh environments and long-distance, with wide practicability.

Description

technical field [0001] The invention belongs to the technical fields of medical treatment, food, chemical industry and environment detection, and particularly relates to a silver-coated optical fiber Raman probe and a preparation method thereof. Background technique [0002] In recent years, the incidence of malignant tumors is high, the detection of low-concentration diseased cells in the early stage of cancer is difficult, and the involved detection equipment is expensive and professional analysts are lacking. Therefore, it is urgent to develop a fast, high-sensitivity, and low-cost biological detection technology. Compared with traditional endoscopy detection, surface-enhanced Raman scattering detection not only has the advantages of rapid and non-destructive Raman detection, but also has high detection sensitivity and good specificity, and can be used in medical, food, chemical, environmental detection and other fields. The decisive factor affecting the performance of fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/42G01N21/65B82Y40/00B82Y30/00
CPCG01N21/65C23C18/42B82Y30/00B82Y40/00
Inventor 李宏龙羽婷杜子娟
Owner WUHAN UNIV OF TECH
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