Copper nano-cluster fluorescent material and preparation method thereof

A fluorescent material, copper nanotechnology, applied in the nano field, can solve the problems of poor stability and low luminous intensity, and achieve the effects of good reproducibility, strong green fluorescence, and high fluorescence quantum yield

Active Publication Date: 2018-01-19
FUJIAN MEDICAL UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, there are relatively few studies on copper nanoclusters, mainly due to their poor stability and low luminous intensity.

Method used

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  • Copper nano-cluster fluorescent material and preparation method thereof
  • Copper nano-cluster fluorescent material and preparation method thereof
  • Copper nano-cluster fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] Add 1 mL of copper nitrate solution with a concentration of 0.1 mol / L dropwise into 10 mL of ascorbic acid solution with a concentration of 0.1 mol / L under stirring conditions, stir at room temperature for 1 hour, and then continue to incubate at room temperature for 12 hours. That is, a copper nanoparticle solution is obtained.

example 2

[0034] Add 0.2 mL of the copper nanoparticle solution prepared in Example 1 into 0.8 mL of ammonia solution with a concentration of 30 mmol / L, mix well, and react at room temperature for 15 minutes to obtain a copper nanocluster fluorescent material solution.

example 3

[0036] The solution obtained in Example 1 and Example 2 is drip-coated on the copper grid. Transmission electron microscope analysis showed that the average particle size of copper nanoparticles and copper nanoclusters were 3.7 ± 0.5 nm ( figure 1 Middle A) and 1.2 ± 0.3 nm ( figure 1 Middle B). This result shows that copper nanoparticles were indeed etched after adding ammonia water.

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Abstract

The invention discloses a copper nano-cluster fluorescent material and a preparation method thereof. Copper nanoparticles protected by ascorbic acid are used as a precursor to synthesize the copper nano-cluster fluorescent material from top to bottom. Ammonia water is used as an etching agent to control the formation of a copper nano-cluster. The preparation method of the novel copper nano-clusterfluorescent material, provided by the invention, has the advantages of simplicity in preparation, environment protection, rapidness, low price and the like. The prepared copper nano-cluster has strong green fluorescent light; the maximum emission wavelength is 498nm and the yield of quanta is 6.63 percent.

Description

technical field [0001] The invention relates to a copper nano-cluster fluorescent material and a preparation method thereof, belonging to the field of nanotechnology. Background technique [0002] In recent years, fluorescent metal nanoclusters have attracted much attention as a new type of fluorescent nanomaterials. Metal nanoclusters refer to molecular-level aggregates composed of several to hundreds of metal atoms under the protection of certain molecular layers. Due to their unique physical, electrical, and optical properties, metal nanoclusters have shown promising applications in fields such as single-molecule optoelectronics, catalysis, bioimaging, and sensors. At present, most studies mainly focus on gold, silver and their alloy nanoclusters. As we all know, copper is more abundant and cheap in the earth's crust than gold and silver, so it is widely used in human's daily life. However, there are relatively few studies on copper nanoclusters, mainly due to their po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/58B82Y40/00B22F9/24
Inventor 陈伟李柯林邓豪华彭花萍庄权权
Owner FUJIAN MEDICAL UNIV
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