Preparation method of three-dimensional ordered titanium dioxide photonic crystal microballoons covered by silver nanoparticles

A technology of photonic crystal microspheres and silver nanoparticles, which is applied to the preparation of microspheres, chemical instruments and methods, microcapsule preparations, etc., can solve the problem of complex manufacturing process of photonic crystal fibers, signal reproducibility cannot be guaranteed, photonic crystal thin films, etc. Problems such as falling off, achieving the effect of low preparation cost, short preparation cycle, and highly ordered arrangement

Inactive Publication Date: 2016-06-08
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the photonic crystal thin film is easy to fall off from the substrate, and it is not easy to prepare a large area. Most of the application of the photonic crystal thin film as the substrate reported in the research, its structure is unstable in detection and the sensitivity is not high, and the detection limit is limited. The key is that the reproducibility of its signal cannot be guaranteed
Three-dimensional ordered highly active substrates are being studied intensively, while three-dimensional photonic crystal fibers cannot be widely used due to the complicated manufacturing process and high cost.

Method used

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  • Preparation method of three-dimensional ordered titanium dioxide photonic crystal microballoons covered by silver nanoparticles
  • Preparation method of three-dimensional ordered titanium dioxide photonic crystal microballoons covered by silver nanoparticles
  • Preparation method of three-dimensional ordered titanium dioxide photonic crystal microballoons covered by silver nanoparticles

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Effect test

Embodiment 1

[0018] (1) Preparation of three-dimensional ordered titanium dioxide photonic crystal microspheres: Mix 75mL of absolute ethanol and 50mL of acetonitrile in a three-necked flask, then add 190uL of ammonia and 455uL of water, and quickly add 1.25mL under vigorous stirring Tetrabutyl titanate was vigorously stirred at a constant temperature of 30°C for 6 hours, and after the reaction was completed, it was centrifuged and washed to obtain a titanium dioxide nanoparticle solution. After ultrasonically dispersing the prepared titanium dioxide nanoparticle solution of a certain concentration for half an hour, suck the solution into a 1mL syringe; at the same time, use a 25mL syringe to draw about 25ml of low-viscosity methyl silicone oil; connect the syringe to the interface of the corresponding single-push syringe pump device On, and the injector is driven by a propeller, the flow rate of the colloidal solution is designed to be 0.5ml / h, and the flow rate of the silicone oil is 10ml...

Embodiment 2

[0021] (1) Preparation of three-dimensional ordered titanium dioxide photonic crystal microspheres: Mix 75mL of absolute ethanol and 50mL of acetonitrile in a three-necked flask, then add 190uL of ammonia and 455uL of water, and quickly add 1.25mL under vigorous stirring Tetrabutyl titanate was vigorously stirred at a constant temperature of 30°C for 6 hours, and after the reaction was completed, it was centrifuged and washed to obtain a titanium dioxide nanoparticle solution. After ultrasonically dispersing the prepared titanium dioxide nanoparticle solution of a certain concentration for half an hour, suck the solution into a 1mL syringe; at the same time, use a 25mL syringe to draw about 25ml of low-viscosity methyl silicone oil; connect the syringe to the interface of the corresponding single-push syringe pump device On, and the injector is driven by a propeller, the flow rate of the designed colloid solution is 1ml / h, and the flow rate of the silicone oil is 5ml / h. Drop t...

Embodiment 3

[0024] (1) Preparation of three-dimensional ordered silver nanoparticles coated titanium dioxide photonic crystal microspheres: Mix 75mL of absolute ethanol and 50mL of acetonitrile in a three-necked flask, then add 190uL of ammonia and 455uL of water, under vigorous stirring conditions Quickly add 1.25mL of tetrabutyl titanate, vigorously stir at 30°C for 6 hours, centrifuge and wash after the reaction to obtain a titanium dioxide nanoparticle solution. After ultrasonically dispersing the prepared titanium dioxide nanoparticle solution of a certain concentration for half an hour, suck the solution into a 1mL syringe; at the same time, use a 25mL syringe to draw about 25ml of low-viscosity methyl silicone oil; connect the syringe to the interface of the corresponding single-push syringe pump device On, and the injector is driven by a propeller, the flow rate of the designed colloid solution is 2ml / h, and the flow rate of the silicone oil is 50ml / h. Drop the emulsion into micro...

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Abstract

The invention discloses a preparation method of three-dimensional ordered titanium dioxide photonic crystal microballoons covered by silver nanoparticles, and belongs to the technical field of biomedical research, environmental monitoring and clinical detection. According to the invention, a microfluidic device is adopted to prepare three-dimensional ordered titanium dioxide photonic crystal microballoons, and then a silver nitrate water solution is adopted to generate the silver nanoparticles through high temperature reduction of a hydrothermal reaction, the silver nanoparticles are loaded uniformly on the surfaces of the titanium dioxide photonic crystal microballoons, and three-dimensional ordered titanium dioxide photonic crystal microballoon structure covered by the silver nanoparticles is generated. The prepared product has the advantages that the structure is simple in regulation and control, is good in repeatability, and is uniform in surface hotspot distribution, so that the prepared three-dimensional ordered titanium dioxide photonic crystal microballoon structure covered by the silver nanoparticles is high in detection sensitivity, is simple in operation and is relatively good in signal reproducibility when the structure is used for surface raman enhanced spectrum substrate detection, and the detection limit range of the composite material in the surface raman enhanced detection field is further improved.

Description

technical field [0001] The invention relates to the technical fields of biomedical research, environmental monitoring and clinical detection, in particular to a preparation method of titanium dioxide photonic crystal microspheres coated with three-dimensional ordered silver nanoparticles. Background technique [0002] At present, surface Raman enhanced spectroscopy has been widely used in biochemistry, chemical molecular detection, imaging, environmental monitoring and sensor applications due to its high detection sensitivity. As an ideal and effective substrate for surface Raman enhanced spectroscopy, it must not only have high sensitivity, but also need to ensure good signal reproducibility. [0003] In order to make full use of the highly uniform periodic arrangement structure of photonic crystals and their advantages of good fabrication reproducibility, photonic crystal materials have been widely used in the research of surface Raman spectroscopy substrates. The prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00B01J13/14B01J19/00G01N21/65
CPCG02B1/005B01J13/14B01J19/00G01N21/65
Inventor 李娟童晶晶李新卉董书君刁国旺
Owner YANGZHOU UNIV
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