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Fluorescence gold nanoparticle and preparation method thereof

A technology of fluorescent gold nanoparticles and particles, which is applied to fluorescent gold nanoparticles and their preparation. The application field of fluorescent gold nanoparticles in detecting mercury ions can solve the problems of poor biocompatibility of gold nanoparticles and achieve good biocompatibility. properties, simple preparation method, and high fluorescence quantum yield

Inactive Publication Date: 2014-04-23
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to commonly used sodium borohydride as reducing agent, other weak reducing agents such as tetrakis(hydroxymethyl)phosphonium chloride, dimercaptosuccinic acid, N,N'-dimethylformamide, 2 , 3-dimercaptosuccinic acid, N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid, 2-(N-morpholino)ethanesulfonic acid, etc. to prepare gold nanoparticles, these compounds are doing The reducing agent can also be used as a ligand to prevent the aggregation of gold nanoparticles, but most of the reducing agents / ligands used in the reported work are organic compounds, and the prepared gold nanoparticles have poor biocompatibility

Method used

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  • Fluorescence gold nanoparticle and preparation method thereof
  • Fluorescence gold nanoparticle and preparation method thereof
  • Fluorescence gold nanoparticle and preparation method thereof

Examples

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Effect test

Embodiment 1

[0018] Take a fresh egg, take out the egg white and dilute it with distilled water 5 times, mix 10mL egg white aqueous solution with 10mL10mmol / L chloroauric acid aqueous solution, 10mL100mmol / L sodium hydroxide aqueous solution, and use a 300W microwave oven Heat for 3 minutes, place at room temperature for 3 minutes, and then heat for 3 minutes to obtain fluorescent gold nanoparticles. The fluorescence emission peak of the gold nanoparticles is about 665 nm, and when observed with a black background under natural light, it presents strong red fluorescence, and the quantum yield is 7.3%.

Embodiment 2

[0020] Take a fresh egg, take out the egg white and dilute it with distilled water 5 times, mix 10mL egg white aqueous solution with 10mL10mmol / L dilute hydrochloric acid solution of gold chloride, 20mL100mmol / L sodium hydroxide aqueous solution, and use A 300W microwave oven was heated for 3 minutes, placed at room temperature for 3 minutes, and then heated for another 3 minutes to obtain fluorescent gold nanoparticles. The fluorescence emission peak of the gold nanoparticles is about 675 nm, and when observed under natural light with a black background, it presents strong red fluorescence, and the quantum yield is 3.0%.

Embodiment 3

[0022] Take a fresh duck egg, take the duck egg white out and dilute it with double distilled water 5 times, mix 10mL duck egg white aqueous solution with 10mL10mmol / L chloroauric acid aqueous solution, 10mL100mmol / L sodium hydroxide aqueous solution, and use 300W It is heated in a microwave oven for 3 minutes, placed at room temperature for 3 minutes, and then heated for 3 minutes to obtain fluorescent gold nanoparticles. The fluorescence emission peak of the gold nanoparticles is about 670 nm, and when observed under natural light with a black background, it presents strong red fluorescence, and the quantum yield is 5.9%.

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Abstract

The invention relates to a fluorescence gold nanoparticle and a preparation method thereof. The fluorescence gold nanoparticle is prepared according to a method including the following steps: mixing an egg white water solution, a gold salt water solution and a sodium hydroxide water solution; heating in a microwave oven for reaction; drying to obtain the fluorescence gold nanoparticle. The fluorescence gold nanoparticle is about 665 micrometers in fluorescence emission peak, appears to be strong red fluorescence when being observed with a black background under natural light, can reach 7.3% in fluorescence quantum yield, is 1.8 microseconds in fluorescence lifetime and can reach more than 12 mouths in room-temperature storage stability. The preparation method is simple, quick and environment friendly, a novel approach is provided for preparation of a fluorescence gold nano-material. The fluorescence gold nanoparticle can be applied to detection of mercury ions, and limit of detection is 3x10-11mol / L.

Description

Technical field [0001] The invention relates to a fluorescent detection material, in particular to a fluorescent gold nanoparticle and a preparation method thereof, and the application of the fluorescent gold nanoparticle in detecting mercury ions. Background technique [0002] Gold nanoparticles have a wide range of applications in optoelectronic devices and biosensors. Many scientists have done a lot of work on the preparation and application of gold nanoparticles. In addition to sodium borohydride as the reducing agent, other weak reducing agents such as tetrakis (hydroxymethyl) phosphonium chloride, dimercaptosuccinic acid, N,N'-dimethylformamide, 2 ,3-Dimercaptosuccinic acid, N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid, 2-(N-morpholinyl)ethanesulfonic acid, etc. to prepare gold nanoparticles. These compounds are doing The reducing agent can also be used as a ligand to prevent the aggregation of gold nanoparticles, but most of the reducing agents / ligands used in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C09K11/58G01N33/52G01N21/64B82Y40/00
Inventor 张彦高鹏飞蔡明发张国梅闫美芬双少敏董川
Owner SHANXI UNIV
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