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Single crystal gold nanosphere and preparation method thereof

A technology of gold nanospheres and spheres, which is applied in the field of monodisperse single crystal gold nanospheres and its preparation, can solve the problem of inability to synthesize single crystal gold nanospheres with uniform size, irregular shape of spherical gold nanoparticles, particle surface Unsmooth and other problems, to achieve the effect of abundant raw materials, high yield and good dispersibility

Active Publication Date: 2017-09-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the spherical gold nanoparticles prepared by the above method are irregular in shape, uneven in size, rough on the particle surface, and have a large number of defects and twin planes inside the particles.
Compared with the preparation of gold nanoparticles with regular morphology and spherical gold nanoparticles mentioned above, there are few reports on effective methods and techniques for synthesizing single crystal gold nanospheres. Uniform and scale-tunable single-crystal gold nanospheres

Method used

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  • Single crystal gold nanosphere and preparation method thereof
  • Single crystal gold nanosphere and preparation method thereof
  • Single crystal gold nanosphere and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] Preparation of 50 nm single crystal gold nanospheres

[0029] First, add diethylene glycol diacrylate phthalate (PDDA, Mw=100000-200000, 20 wt%) aqueous solution to the ethylene glycol solution, stir well to obtain a mixed solution; then add Chlorauric acid (HAuCl 4 ), and a small amount of silver nitrate (AgNO 3 ) and ferric chloride (FeCl 3) aqueous solution to obtain a reaction precursor solution, in which, diethylene glycol diacrylate (PDDA), chloroauric acid (HAuCl 4 ), silver nitrate (AgNO 3 ), ferric chloride (FeCl 3 ) in the precursor are 0.025 mol / L, 0.0005 mol / L, 0.00002 mol / L, 0.000000125 mol / L; subsequently, the reaction precursor solution is placed at 220 ℃ for 0.5 hours to obtain a red colloidal solution , after naturally cooling to room temperature, use a high-speed centrifuge to centrifuge at a speed of 14,500 rpm for 30 minutes, remove the colorless solution in the centrifuge tube, and obtain the precipitated product; then use deionized water to ul...

Embodiment 2

[0031] Preparation of 100 nm Single Crystal Gold Nanospheres

[0032] First, add diethylene glycol diacrylate phthalate (PDDA, Mw=100000-200000, 20 wt%) aqueous solution to the ethylene glycol solution, stir well to obtain a mixed solution; then add Chlorauric acid (HAuCl 4 ) and a small amount of silver nitrate (AgNO 3 ) and ferric chloride (FeCl 3 ) aqueous solution to obtain a reaction precursor solution, in which, diethylene glycol diacrylate (PDDA), chloroauric acid (HAuCl 4 ), silver nitrate (AgNO 3 ), ferric chloride (FeCl 3 ) concentrations in the precursor are 0.025 mol / L, 0.0005 mol / L, 0.00002 mol / L, 0.000001 mol / L; subsequently, react the precursor solution at 220 ℃ for 1 hour to obtain a red colloidal solution , after naturally cooling to room temperature, use a high-speed centrifuge to centrifuge at a speed of 12,000 rpm for 20 minutes, remove the colorless solution in the centrifuge tube, and obtain a red precipitate product; then use deionized water to ultr...

Embodiment 3

[0034] Preparation of 150 nm Single Crystal Gold Nanospheres

[0035] First, add diethylene glycol diacrylate phthalate (PDDA, Mw=100000-200000, 20 wt%) aqueous solution to the ethylene glycol solution, stir well to obtain a mixed solution; then add Chlorauric acid (HAuCl 4 ), and a small amount of silver nitrate (AgNO 3 ) and ferric chloride (FeCl 3 ) aqueous solution to obtain a reaction precursor solution, in which, diethylene glycol diacrylate (PDDA), chloroauric acid (HAuCl 4 ), silver nitrate (AgNO 3 ), ferric chloride (FeCl 3 ) in the precursor are 0.025 mol / L, 0.0005 mol / L, 0.00002 mol / L, 0.0000015 mol / L; subsequently, react the precursor solution at 220 ℃ for 1.5 hours to obtain a red colloidal solution , after naturally cooling to room temperature, use a high-speed centrifuge to centrifuge at a speed of 10,000 rpm for 10 minutes, remove the colorless solution in the centrifuge tube, and obtain a red precipitate product; then use deionized water to ultrasonically...

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Abstract

The invention relates to a monodisperse single crystal gold nanosphere and a preparation method thereof. Single crystal gold nanospheres have the characteristics of smooth surface, uniform size, and good dispersion; their size can be effectively adjusted within the range of 50-200 nanometers; the preparation steps include: (1) sequentially pouring Add diethylene glycol diacrylate phthalate, chloroauric acid and a small amount of silver nitrate and ferric chloride aqueous solution; (2) place the reaction precursor solution at 150-250 ° C for 0.5-12 hours, and then Centrifuge at 5000-14500 rpm for 5-100 minutes; (3) ultrasonically clean the red precipitated product with a solvent to obtain monodisperse single-crystal gold nanospheres. The single crystal gold nanosphere in the present invention has important application value in metal photonic crystal, surface plasmon optics, surface enhanced Raman scattering, biological / chemical sensing, medical detection and the like.

Description

technical field [0001] The invention relates to a monodisperse single crystal gold nanosphere and a preparation method thereof. Background technique [0002] Gold nanoparticles are a kind of noble metal nanoparticles. These particles have unique optical and electrochemical properties and excellent thermal stability. Most importantly, gold nanoparticles have good biocompatibility and are resistant to proteins, enzymes and biomolecules. It has a strong adsorption function, which makes it useful in metal photonic crystals, surface plasmon optics, surface-enhanced Raman scattering (SERS), chemical and biological sensing, photothermal therapy, biomedical detection, labeling, drug delivery, etc. important application value. Many excellent properties of gold nanoparticles are mainly determined by their size and shape. Therefore, the synthesis of monodisperse gold nanoparticles is crucial for the above applications. In order to controllably obtain gold nanoparticles, people have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 张涛李村成孙一强李杰徐波刘其生
Owner UNIV OF JINAN
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