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Monocrystal gold nano balls and preparation method thereof

A gold nanometer and spherical technology, which is applied in the field of monodisperse single crystal gold nanospheres and their preparation, can solve the problem of inability to synthesize single crystal gold nanospheres of uniform size, irregular shape of spherical gold nanoparticles, and particle surface. not smooth and other problems, to achieve the effect of rich raw materials, high yield and good dispersibility

Active Publication Date: 2016-04-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Monocrystal gold nano balls and preparation method thereof
  • Monocrystal gold nano balls and preparation method thereof
  • Monocrystal gold nano balls and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Preparation of 50nm Single Crystal Gold Nanospheres

[0030] First, add diethylene glycol diacrylate phthalate (PDDA, Mw=100000-200000, 20wt%) aqueous solution to the ethylene glycol solution, stir well to obtain a mixed solution; then add chlorine in sequence under magnetic stirring conditions Auric 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, 0.000000125 mol / L; subsequently, react the precursor solution at 220°C 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...

Embodiment 2

[0032] Preparation of 100nm Single Crystal Gold Nanospheres

[0033] First, add diethylene glycol diacrylate phthalate (PDDA, Mw=100000-200000, 20wt%) aqueous solution to the ethylene glycol solution, stir well to obtain a mixed solution; then add chlorine in sequence under magnetic stirring conditions Auric 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°C 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 pr...

Embodiment 3

[0035] Preparation of 150nm Single Crystal Gold Nanospheres

[0036] First, add diethylene glycol diacrylate phthalate (PDDA, Mw=100000-200000, 20wt%) aqueous solution to the ethylene glycol solution, stir well to obtain a mixed solution; then add chlorine in sequence under magnetic stirring conditions Auric 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, 0.0000015 mol / L; subsequently, react the precursor solution at 220°C 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 r...

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Abstract

The invention relates to monodisperse monocrystal gold nano balls and a preparation method thereof. The monodisperse monocrystal gold nano balls have the characteristics of being smooth in surface, uniform in dimension, good in dispersity and the like. The dimension of the monodisperse monocrystal gold nano balls can be effectively regulated and controlled in the range from 50 nanometers to 200 nanometers. The preparation method of the monodisperse monocrystal gold nano balls includes the steps that (1) under the stirring condition, phthalic diglycol diacrylate, chloroauric acid and a small amount of silver nitrate and ferric trichloride aqueous solution are sequentially added to an ethylene glycol solution; (2) after a reaction precursor solution is placed at the temperature of 150-250 DEG C to react for 0.5-12 hours, centrifugation is conducted for 5-100 minutes under the condition that the rotating speed is 5000-14500 revolutions per minute; and (3) ultrasonic cleaning is conducted on red sediment products through a solvent, and the monodisperse monocrystal gold nano balls are obtained. The monodisperse monocrystal gold nano balls have significant application value in the aspects of metallic photonic crystals, plasmonics, surface enhanced Raman scattering, biological / chemical sensing, medical testing 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 Applications(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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