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Stereo pentagram gold nanoparticles and preparation method thereof

A gold nanoparticle and five-pointed star technology, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of insufficient gold nanoparticle preparation technology, and achieve short preparation time and particle size Uniform, commercially-ready application results

Inactive Publication Date: 2017-04-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to overcome the deficiencies of the existing gold nanoparticle preparation technology, and propose a simple and rapid synthesis method for preparing three-dimensional five-pointed star gold nanoparticles; high-yield controlled synthesis of three-dimensional five-pointed star gold nanoparticles with uniform scale

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  • Stereo pentagram gold nanoparticles and preparation method thereof
  • Stereo pentagram gold nanoparticles and preparation method thereof
  • Stereo pentagram gold nanoparticles and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] Preparation of 40 nm three-dimensional pentagram gold nanoparticles

[0035] Under stirring conditions, first add polydiallyldimethylammonium chloride (PDDA) aqueous solution to the ethylene glycol solution; then add chloroauric acid (HAuCl 4 ), ascorbic acid (AA) aqueous solution and gold decahedral nanoparticle colloidal solution to obtain the reaction precursor solution. Among them, polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl) 4 ), ascorbic acid (AA), and the concentration of the gold decahedral nanoparticle colloidal solution in the precursor are respectively 0.025 mol / L, 0.0005 mol / L, 0.005 mol / L, 0.000125 mol / L; after the mixture is uniform, stop stirring and Place the reaction precursor in an oven at 45°C and let it stand for 1 hour for reaction to obtain a blue-violet colloidal solution. After centrifugation in a high-speed centrifuge at 14500 rpm for 30 minutes, remove the colorless solution from the centrifuge tube to obtain a precipitated ...

Embodiment 2

[0037] Preparation of 50 nm three-dimensional pentagram gold nanoparticles

[0038] Under stirring conditions, first add polydiallyldimethylammonium chloride (PDDA) aqueous solution to the ethylene glycol solution; then add chloroauric acid (HAuCl 4 ), ascorbic acid (AA) aqueous solution and gold decahedral nanoparticle colloidal solution to obtain the reaction precursor solution. Among them, polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl) 4 ), ascorbic acid (AA), and the concentration of the gold decahedral nanoparticle colloidal solution in the precursor are respectively 0.025 mol / L, 0.0005 mol / L, 0.005 mol / L, 0.000125 mol / L; after the mixture is uniform, stop stirring and Place the reaction precursor in an oven at 30°C and let it stand for 1 hour to obtain a blue colloidal solution. After centrifugation at a speed of 13,000 rpm for 30 minutes in a high-speed centrifuge, remove the colorless solution from the centrifuge tube to obtain a precipitated product;...

Embodiment 3

[0040] Preparation of 55 nm three-dimensional pentagram gold nanoparticles

[0041] Under stirring conditions, first add polydiallyldimethylammonium chloride (PDDA) aqueous solution to the ethylene glycol solution; then add chloroauric acid (HAuCl 4 ), ascorbic acid (AA) aqueous solution and gold decahedral nanoparticle colloidal solution to obtain the reaction precursor solution. Among them, polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl) 4 ), ascorbic acid (AA), and the concentration of the gold decahedral nanoparticle colloidal solution in the precursor are respectively 0.025 mol / L, 0.0005 mol / L, 0.005 mol / L, 0.000125 mol / L; after the mixture is uniform, stop stirring and The reaction precursor was placed in a constant temperature water bath at 15 ℃ and allowed to stand for 2 hours for reaction to obtain a dark blue colloidal solution. After centrifugation in a high-speed centrifuge at 12000 rpm for 30 minutes, the colorless solution in the centrifuge tube ...

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Abstract

The invention relates to monodisperse three-dimensional five-pointed star gold nanoparticles with remarkable surface plasmon resonance absorption performance and surface-enhanced Raman effect and a preparation method thereof. Pentagram gold nanoparticles have the characteristics of uniform size and good dispersion, and their size can be effectively adjusted within the range of 40-60 nanometers. The preparation steps include: (1) sequentially adding polydiallyldimethylammonium chloride, chloroauric acid, ascorbic acid and gold nanometer decahedral colloidal solution to the ethylene glycol solution under agitation; (2) adding the reaction precursor The body solution was reacted at 0-100°C for 0.5-4 hours, and centrifuged at 5000-15000 rpm for 10-100 minutes; (3) The blue precipitate product was ultrasonically cleaned with a solvent to obtain a monodisperse five-pointed star Gold Nanoparticles. The five-pointed star gold nanoparticle in the present invention has important application value in photocatalysis, plasmonic optics, chemical and biological sensing, solar cells, surface-enhanced Raman scattering (SERS), and the like.

Description

Technical field [0001] The invention relates to a monodisperse three-dimensional five-pointed star gold nanoparticle with significant surface plasmon resonance absorption performance and surface enhanced Raman effect and a preparation method thereof. Background technique [0002] Gold nanoparticles have unique surface plasmon absorption properties and good biocompatibility. These characteristics make it have very important application value and broad application prospects in surface plasmon optics, chemical / biological sensing, medical imaging, surface enhanced Raman scattering spectroscopy, photothermal therapy, etc. Studies have shown that the surface plasmon absorption properties of gold nanoparticles are closely related to structural factors such as scale and morphology. Therefore, the controllable construction of gold nanoparticles with uniform scale and regular morphology has always attracted attention. In recent years, people have developed a variety of gold nanoparticle ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/24G01N21/65B82Y30/00B82Y40/00
Inventor 张涛李村成李杰孙一强徐波
Owner UNIV OF JINAN
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