Silver plated optical fiber Raman probe and preparation method thereof

A fiber Raman and silver light technology is applied in the field of silver-coated fiber Raman probe and its preparation, which can solve the problems of complex preparation process, and achieve the effects of simple control conditions, widening detection range and low preparation cost.

Active Publication Date: 2018-03-27
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.

Method used

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  • Silver plated optical fiber Raman probe and preparation method thereof
  • Silver plated optical fiber Raman probe and preparation method thereof
  • Silver plated optical fiber Raman probe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of silver-plated optical fiber Raman probe, its preparation method comprises the following steps:

[0036] 1) Optical fiber pretreatment: peel off the 2-5cm long coating layer at one end of the optical fiber to expose the optical fiber cladding, cut the end face flat, clean it with acetone and distilled water in sequence, and dry it in an oven at 60°C for storage;

[0037] 2) Precursor solution preparation: Dissolve silver nitrate and sodium bicarbonate in water and mix well, prepare silver nitrate aqueous solution with a concentration of 0.067mol / L and sodium bicarbonate aqueous solution with a concentration of 0.04mol / L, add 30mL silver nitrate Add polyvinylpyrrolidone to the solution, wherein the molar ratio of polyvinylpyrrolidone to silver nitrate is 8:1, stir to dissolve, stir evenly, add 30mL sodium bicarbonate solution, and continue to stir evenly to obtain a precursor solution;

[0038] 3) Preparation of silver-coated optical fiber probe by solvothermal ...

Embodiment 2

[0044] A kind of silver-plated optical fiber Raman probe, its preparation method comprises the following steps:

[0045] 1) Optical fiber pretreatment: peel off the 2-5cm long coating layer at one end of the optical fiber to expose the optical fiber cladding, cut the end face flat, clean it with acetone and distilled water in sequence, and dry it in an oven at 60°C for storage;

[0046] 2) Precursor solution preparation: Dissolve silver nitrate and sodium bicarbonate in water and mix them evenly, respectively prepare silver nitrate aqueous solution with a concentration of 0.067mol / L and sodium bicarbonate aqueous solution with a concentration of 0.04mol / L, and add 30mL nitric acid 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, add 30mL sodium bicarbonate solution, and continue stirring evenly to obtain a precursor solution;

[0047] 3) Preparation o...

Embodiment 3

[0052] A kind of silver-plated optical fiber Raman probe, its preparation method comprises the following steps:

[0053] 1) Optical fiber pretreatment: peel off the 2-5cm long coating layer at one end of the optical fiber to expose the optical fiber cladding, cut the end face flat, clean it with acetone and distilled water in sequence, and dry it in an oven at 60°C for storage;

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

[0055] 3) P...

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Abstract

The invention discloses a silver plated optical fiber Raman probe and a preparation method thereof, and belongs to the technical field of medical, chemical and environmental detection and food detection. A one-step solvothermal method is adopted, water or ethylene glycol is used as a solvent, optical fibers which are simply pretreated are soaked into a precursor solution of silver to be subjectedto solvothermal reaction, and the optical fiber Raman probe of which the surface is loaded with Ag nano particles is obtained. The silver nano particles prepared through the preparation method are controllable and adjustable in shape and size, operation is easy, and growing of the silver nano particles and loading, on the optical fibers, of the silver nano particles can be further completed. Compared with traditional Raman enhanced substrates, the excellent surface enhancement Raman scattering effect of the silver nano particles are sufficiently combined with the optical conduction effect of the optical fibers, the size and shape of the obtained silver nano particles are adjusted and controlled, the obtained silver plated optical fiber Raman probe shows super-high sensitivity and selectivity when detecting low-concentration materials, can conduct real-time detection under the severe environment, the remote environment and other special environments, and is high in practicability.

Description

technical field [0001] The invention belongs to the detection technical fields of medical treatment, food, chemical industry and environment, and in particular relates to a silver-plated optical fiber Raman probe and a preparation method thereof. Background technique [0002] In recent years, the incidence of malignant tumors is high, and it is difficult to detect low-concentration lesion cells in the early stage of cancer. The detection equipment involved is expensive, and professional analysts are scarce. Therefore, it is imminent to develop a rapid, high-sensitivity, and low-cost biological detection technology. Compared with traditional endoscopic detection, surface-enhanced Raman scattering detection not only has the advantages of fast 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 factors affecting the performance of fib...

Claims

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Application Information

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Patent Type & Authority Applications(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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