Method for embedding precious metal nanoparticles into rare earth doped luminescent material

A rare earth doped and luminescent material technology, applied in the field of rare earth ion doped inorganic luminescent material preparation, can solve problems such as low fluorescence radiation regulation efficiency, and achieve the effects of enhancing regulation efficiency, increasing fluorescence emission performance, and improving crystallinity

Active Publication Date: 2018-11-06
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can only realize the regulation of plasmons on the surface of rare earth particles in the nanoscale range, but have no effect on most of the luminescent ions inside the particles, which makes the regulation efficiency of surface plasmons on the fluorescence radiation of the system very low.

Method used

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  • Method for embedding precious metal nanoparticles into rare earth doped luminescent material
  • Method for embedding precious metal nanoparticles into rare earth doped luminescent material
  • Method for embedding precious metal nanoparticles into rare earth doped luminescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Au nanoparticles coated YF 3 :Eu 3+ submicron crystals

[0036] Add 0.95mL 0.5mmol / L Y(NO 3 ) 3 aqueous solution and 0.05mL 0.5mmol / LEu(NO 3 ) 3 Aqueous solution, 3mL 0.5mmol / L NaF aqueous solution, in 75°C environment, constant temperature reaction for 2 hours, natural cooling, sequential washing with deionized water and absolute ethanol, and drying at 60°C for 10 hours to obtain YF 3 :Eu 3+ submicron crystals. 0.03g (0.2mmol) YF 3 :Eu 3+ Submicron crystals were added to 40 mL of deionized water, and 1.4 g (7.2 mmol) of trisodium citrate was added. After ultrasonication at room temperature for 10 minutes, the temperature was raised to 70°C, and 30 μL (0.167 mmol) of 3-aminopropyltrimethoxysiloxane was added. , continue to heat up to 90°C, then add 3mL of 0.01mol / L chloroauric acid aqueous solution, react at constant temperature for 15 minutes, cool naturally, sequentially wash with deionized water and absolute ethanol, and dry at 60°C for 10 hours to obtain...

Embodiment 2

[0040] In this example, the YF 3 :Eu 3+ @Au submicron crystals are irradiated with laser for 5 seconds, the laser wavelength is 532nm (coupled with the wavelength of the Au nanoparticle plasmon resonance peak), and the laser power density is 2×10 3 W / cm 2 , other steps are identical with embodiment 1. Depend on Figure 6-8 It can be seen that some Au nanoparticles are embedded in YF 3 :Eu 3+ Inside the submicron particles, the embedded parts of the Au nanoparticles are circled (see Figure 8 ), and the particle size of Au nanoparticles increases to 20-80nm.

Embodiment 3

[0042] 1. Au nanoparticles coated NaYF 4 :Eu 3+ submicron crystals

[0043] Add 0.95mL 0.5mmol / L Y(NO 3 ) 3 aqueous solution and 0.05mL 0.5mmol / LEu(NO 3 ) 3 Aqueous solution, 7mL 0.5mmol / L NaF aqueous solution, stirred at room temperature for 60 minutes, heated up to 75°C, reacted at constant temperature for 2 hours, cooled naturally, washed with deionized water and absolute ethanol successively, dried at 60°C for 10 hours, and obtained NaYF 4 :Eu 3+ submicron crystals. 0.03g (0.16mmol) NaYF 4 :Eu 3+ Submicron crystals were added to 40 mL of deionized water, and 1.4 g (7.28 mmol) of trisodium citrate was added. After ultrasonication at room temperature for 10 minutes, the temperature was raised to 70°C, and 30 μL (0.167 mmol) of 3-aminopropyltrimethoxysiloxane was added. , continue to heat up to 90°C, then add 3mL of 0.01mol / L chloroauric acid aqueous solution, react at constant temperature for 15 minutes, cool naturally, successively wash with deionized water and abs...

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Abstract

The invention discloses a method for embedding precious metal nanoparticles into a rare earth doped luminescent material. Under the heat effect of precious metal nanostructure plasmons, small-sized precious metal nanoparticles with large absorption cross section are taken as a heat source, the nanoparticles produce high heat within quite short time under the action of an externally applied light field, and the precious metal nanoparticles grow rapidly and are embedded into the rare earth doped luminescent material. The effective action range of the plasmons on the surfaces of the precious metal nanoparticles is expanded greatly, scattering cross section of the precious metal nanoparticles is increased, regulation efficiency of the plasmons for fluorescent radiation of a system is improvedgreatly, and luminescence property of the material is regulated effectively. Reaction time is short, required power density of exciting light is low, the method has wavelength dependence characteristic, exciting light wavelength can be adjusted linearly by regulating position of a formant of the plasmons of the precious metal nanoparticles, meanwhile, crystallinity of the luminescent material is improved, and fluorescence emission performance of the material is further optimized.

Description

technical field [0001] The invention belongs to the technical field of preparation of rare-earth ion-doped inorganic luminescent materials, and in particular relates to a method for embedding noble metal nanoparticles into rare-earth-doped luminescent materials. Background technique [0002] Phosphors doped with rare earth ions have unique electronic configurations and rich energy level structures, endowing them with many excellent optical properties such as sharp spectral lines, rich emission bands, low background fluorescence and long fluorescence lifetimes, and are widely used in Bioimaging, medical diagnosis and treatment, solar cells, photocatalysis, LED imaging, biocoding, optical storage and other fields. However, because many transitions in rare earth ions belong to parity-forbidden f-f transitions, their corresponding absorption cross-sections and emission efficiencies are still relatively low, and the mutual interference between some rare earth ion fluorescence rad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85
CPCC09K11/779C09K11/7791
Inventor 张正龙靳娜娜张成云郑海荣付正坤
Owner SHAANXI NORMAL UNIV
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