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3D pentacle gold nanoparticle and preparation method thereof

A gold nanoparticle and nanoparticle technology, which is applied in the field of monodisperse three-dimensional five-pointed star gold nanoparticles and its preparation, can solve the problems of insufficient gold nanoparticle preparation technology, and achieve short preparation time, high yield, and uniform particle size Effect

Inactive Publication Date: 2015-08-26
UNIV OF JINAN
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  • 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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  • 3D pentacle gold nanoparticle and preparation method thereof
  • 3D pentacle gold nanoparticle and preparation method thereof
  • 3D pentacle gold nanoparticle and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] Preparation of 40 nm Stereo Pentagram Gold Nanoparticles

[0035] Under stirring conditions, polydiallyldimethylammonium chloride (PDDA) aqueous solution was first added to the ethylene glycol solution; followed by addition of chloroauric acid (HAuCl 4 ), ascorbic acid (AA) aqueous solution and gold decahedral nanoparticle colloidal solution to obtain a reaction precursor solution, in which polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl 4 ), ascorbic acid (AA), and gold decahedron nanoparticle colloidal solutions in the precursors at a concentration of 0.025 mol / L, 0.0005 mol / L, 0.005 mol / L, and 0.000125 mol / L; after mixing evenly, stop stirring and The reaction precursor was placed in an oven at 45°C for 1 hour to obtain a blue-purple colloidal solution, which was centrifuged at a speed of 14,500 rpm for 30 minutes in a high-speed centrifuge, and the colorless solution in the centrifuge tube was removed to obtain a precipitated product; The pre...

Embodiment 2

[0037] Preparation of 50 nm Stereo Pentagram Gold Nanoparticles

[0038] Under stirring conditions, polydiallyldimethylammonium chloride (PDDA) aqueous solution was first added to the ethylene glycol solution; followed by addition of chloroauric acid (HAuCl 4 ), ascorbic acid (AA) aqueous solution and gold decahedral nanoparticle colloidal solution to obtain a reaction precursor solution, in which polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl 4 ), ascorbic acid (AA), and gold decahedron nanoparticle colloidal solutions in the precursors at a concentration of 0.025 mol / L, 0.0005 mol / L, 0.005 mol / L, and 0.000125 mol / L; after mixing evenly, stop stirring and Put the reaction precursor in an oven at 30°C and let it stand for 1 hour to react to obtain a blue colloidal solution. After centrifuging with a high-speed centrifuge at a speed of 13,000 rpm for 30 minutes, remove the colorless solution in the centrifuge tube to obtain a precipitated product; The p...

Embodiment 3

[0040] Preparation of 55 nm Stereo Pentagram Gold Nanoparticles

[0041] Under stirring conditions, polydiallyldimethylammonium chloride (PDDA) aqueous solution was first added to the ethylene glycol solution; followed by addition of chloroauric acid (HAuCl 4 ), ascorbic acid (AA) aqueous solution and gold decahedral nanoparticle colloidal solution to obtain a reaction precursor solution, in which polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl 4 ), ascorbic acid (AA), and gold decahedron nanoparticle colloidal solutions in the precursors at a concentration of 0.025 mol / L, 0.0005 mol / L, 0.005 mol / L, and 0.000125 mol / L; after mixing evenly, stop stirring and The reaction precursor was placed in a constant temperature water bath at 15°C and allowed to stand for 2 hours to obtain a dark blue colloidal solution, which was centrifuged with a high-speed centrifuge at a speed of 12,000 rpm for 30 minutes, and then the colorless solution in the centrifuge tube w...

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Abstract

The invention relates to a monodisperse 3D pentacle gold nanoparticle that has substantial surface plasma resonance absorption property and surface enhanced Raman effect, and a preparation method thereof. The pentacle gold nanoparticle has the characteristics of uniform scale and good dispersibility, and the size of the product is between 40-60 nanometer and can be regulated and controlled effectively. The preparation comprises the following steps: 1. Add poly diallyl dimethyl ammonium chloride, auric chloride acid, ascorbic acid and gold nanometer decahedron colloidal solution into glycol solution in order in order while stirring; 2. Put the reaction precursor solution for 0.5-4 hour in the temperature between 0-100 DEG C, then perform centrifugation for 10-100 minutes at a 5000-15000 rev / min; 3. Clean the blue deposition product by asolvent with ultrasonic to obtain the monodisperse pentacle gold nanoparticle. The pentacle gold nanoparticle in the invention has important application value in photocatalysis, plasma optical, chemical and biology sensing, solar energy cell and surface enhanced Raman scattering (SERS) etc.

Description

technical field [0001] 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. 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, and photothermal therapy. Studies have shown that the surface plasmon absorption properties of gold nanoparticles are closely related to their size, shape and other structural factors. Therefore, the controllable construction of gold nanoparticles with uniform size and regular shape has attracted much attention. In recent years, various strategies for the synthesis of gold nanoparticles i...

Claims

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Application Information

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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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