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Method for preparing fluorescence detection membrane containing dual-bandgap photonic crystals for fluorescence detection of explosives

A photonic crystal and fluorescence detection technology, applied in the field of fluorescence chemical sensors, to achieve the effect of improving sensitivity

Active Publication Date: 2011-01-12
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of fluorescence detection film containing double-bandgap photonic crystals based on double-bandgap photonic crystals for the fluorescence detection of explosives has not been reported to achieve a greater increase in the sensitivity of explosives detection.

Method used

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  • Method for preparing fluorescence detection membrane containing dual-bandgap photonic crystals for fluorescence detection of explosives
  • Method for preparing fluorescence detection membrane containing dual-bandgap photonic crystals for fluorescence detection of explosives
  • Method for preparing fluorescence detection membrane containing dual-bandgap photonic crystals for fluorescence detection of explosives

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Embodiment 1

[0041] Referring to the method proposed in Patent Application No. 200710179880.3, at room temperature (25° C.), disperse monodisperse poly(styrene-methyl methacrylate-acrylic acid) latex particles with a particle size of 210 nm in water to obtain an emulsion, and in the emulsion The concentration of the monodisperse poly(styrene-methyl methacrylate-acrylic acid) latex particle is 30wt%, then the emulsion of the obtained monodisperse poly(styrene-methyl methacrylate-acrylic acid) latex particle is used as spray Ink printing ink is packed in the ink box that conventional inkjet printer is used, then prints glass substrate through printer by usual method, after printing film is dried, then the monodisperse poly(styrene-methacrylic acid) that particle diameter is 270nm The emulsion (the concentration of monodisperse poly(styrene-methyl methacrylate-acrylic acid) latex particle in the emulsion is 30wt%) of the latex particle of methyl ester-acrylic acid) is packed in the ink cartrid...

Embodiment 2

[0044] At room temperature (25°C), the fluorescent molecule N,N'-bis(a-naphthyl)-N,N'-diphenyl-4,4'-binaphthylamine was dispersed into a single particle with a particle size of 180nm Disperse the emulsion of poly(styrene-methyl methacrylate-acrylic acid) latex particles to obtain a mixed solution, and the fluorescent molecule N,N'-bis(a-naphthyl)-N,N'-diphenyl in the mixed solution - The concentration of 4,4'-binaphthylamine is 10 -4 mol / L, the concentration of monodisperse poly(styrene-methyl methacrylate-acrylic acid) latex particle is 30wt%; Reference patent application number: the method proposed in 200710179880.3, the mixed solution is packed in the conventional jet printing ink as ink-jet printing ink Ink cartridges used in ink printers, and then print the paper base material by the printer according to the usual method, after the printing film is dried; The base-4,4'-binaphthylamine is dispersed in the emulsion containing the monodisperse poly(styrene-methyl methacryla...

Embodiment 3

[0046] At room temperature (25°C), the fluorescent molecule 4-amino-N-phenyl-1,8-naphthalimide was dispersed together with two kinds of monodisperse polystyrene latex particles with different particle sizes of 210nm and 230nm In water, mixed solutions were obtained respectively, and the concentration of the fluorescent molecule 4-amino-N-phenyl-1,8-naphthalimide in the two mixed solutions was 10 -4 mol / L, the concentration of monodisperse polystyrene latex particle is all 15wt%, with reference to the method that the patent application number: 200710064245.0 proposes, wherein a mixed solution is packed in the container with conventional air spray gun, the spray gun is aimed at The selected glass substrate is sprayed, and the coating film is dried; then another mixed solution is placed in a container with a conventional air spray gun, and then the spray gun is aimed at the above-mentioned monodisperse latex particle polystyrene surface that has been sprayed. The glass substrate ...

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Abstract

The invention relates to a method for preparing a fluorescence detection membrane containing dual-bandgap photonic crystals for fluorescence detection of explosives. The dual-bandgap photonic crystals are introduced into the fluorescence detection membrane, wherein peak positions of the wavelength of exciting light of fluorescence for detecting the explosives and the transmission wavelength of fluorescent molecules in the fluorescence detection membrane are overlapped with the band edge of the two-photon bandgap of the fluorescence detection membrane containing the dual-bandgap photonic crystals. The method comprises a one-step method and a two-step method, wherein the one-step method comprises the steps of dispersing fluorescent molecules into emulsion containing mono-dispersed emulsion particles with two particle sizes, and forming the membrane in a mode of twice spray ink printing, spraying or vertical deposition; and the two-step method comprises the steps of: preparing a dual-bandgap photonic crystal membrane (containing an opal or inverse opal structure); and dispersing the fluorescent molecules onto the surface of the dual-bandgap photonic crystal membrane by adopting a physical vaporous deposition method or spin coating method. By utilizing the control function of the dual-bandgap photonic crystals on light with specific wavelength, the fluorescent signals are enhanced and the detection sensitivity is greatly improved finally.

Description

technical field [0001] The invention belongs to the technical field of fluorescent chemical sensors and the application of double-bandgap photonic crystal films, and in particular relates to the use of the double-bandgap photonic crystal's two-photon bandgap characteristics, large specific surface area and continuous channels to improve the sensitivity of fluorescent detection of explosives A method for preparing a highly sensitive fluorescence detection film containing a double-bandgap photonic crystal. Background technique [0002] In recent years, the demand for anti-terrorism, non-metallic landmine detection, and environmental quality monitoring has increased sharply. Research on new methods for rapid detection of trace explosives is essential for timely detection of hidden explosives, prevention of terrorist crimes, protection of public safety, and tracking of environmental quality. is of great significance. How to detect explosives quickly, highly sensitively, and in ...

Claims

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Application Information

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IPC IPC(8): B32B27/06B32B27/08G01N21/64B05D5/06C23C14/24C23C14/12B41J2/01
Inventor 李珩王京霞宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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