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A method for preparing gold nanoparticles by laser generating hydrated electrons

A technology of nano-gold particles and hydrated electrons, applied in the field of material science, can solve the problems of complex device, cumbersome process, long time-consuming, etc., and achieve the effect of preventing aggregation and growth, simple operation and large particle size range.

Inactive Publication Date: 2016-06-22
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can accurately control the size of nanoparticles and avoid the agglomeration of tiny nanoparticles, but there are also certain defects, such as complex devices, cumbersome processes, and long time-consuming

Method used

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  • A method for preparing gold nanoparticles by laser generating hydrated electrons
  • A method for preparing gold nanoparticles by laser generating hydrated electrons
  • A method for preparing gold nanoparticles by laser generating hydrated electrons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put 66.14mg of anionic surfactant sodium dodecylsulfonate (molecular weight 272.38) and 8.74mg organic small molecule trans-1,2-stilbene (molecular weight 180.25) into 100mL of water, and ultrasonically dissolve it for 5 minutes to prepare Water-surfactant-organic molecule solution. 1mL mass fraction is that the chloroauric acid solution of 0.1% is mixed with 5mL water-surfactant-organic molecule solution and put into flow sample cell, wherein the mass ratio of surfactant, organic molecule and chloroauric acid is 5: 1:1. A nanosecond pulse laser with a pulse width of 8 ns, a repetition rate of 10 Hz, and an energy of 10 mW is focused through a lens and irradiates the mixed solution for 5-10 min. The color of the solution changed from light blue to light red, and finally to red, forming gold nanoparticles.

[0030] Such as figure 2 Shown is the ultraviolet-visible absorption spectrum of the nano-gold particle of embodiment 1, and the maximum absorption of the nano-go...

Embodiment 2

[0032] Put 33.07mg of anionic surfactant sodium dodecylsulfonate (molecular weight 272.38) and 4.37mg of organic small molecule trans-1,2-stilbene (molecular weight 180.25) into 100mL of distilled water, ultrasonically dissolve for 5 minutes, and prepare into a water-surfactant-organic molecule solution. 1mL mass fraction is that the chloroauric acid solution of 0.1% is mixed with 5mL water-surfactant-organic molecule solution and put into flow sample cell, wherein the mass ratio of surfactant, organic molecule and chloroauric acid is 5: 1:2. A nanosecond pulse laser with a pulse width of 8 ns, a repetition rate of 10 Hz, and an energy of 10 mW is focused through a lens and irradiates the mixed solution for 5-10 min. The color of the solution changed from light blue to light red, and finally to red, forming gold nanoparticles. The particle size of the produced nano-gold particles is confirmed to be 40-50nm by ultraviolet-visible absorption spectrum and electron micrograph. ...

Embodiment 3

[0034] Compared with Example 1, except that the energy of the nanosecond pulsed laser is set to 20mW, others are the same as Example 1, and the particle size of the produced nano-gold particles is confirmed to be 10-16nm by ultraviolet-visible absorption spectrum and electron microscope.

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Abstract

The invention discloses a method using laser to generate hydrated electrons to prepare gold nanometer particles. The method comprises the following steps of placing a surface active agent and small organic molecules into water to be ultrasonically dissolved to be prepared into water-surface active agent-organic molecule solution, dissolving chloroauric acid crystal into water to be prepared into chloroauric acid solution, forming a mixed solution through the water-surface active agent-organic molecule solution and the chloroauric acid solution in proportion, adding the mixed solution into a flow sample tank, focusing pulse laser to irradiate the mixed solution to generate the hydrated electrons to restore the chloroauric acid for 5-10min, and preparing the gold nanometer particles. The particle size of the gold nanometer particles can be changed by changing laser energy or changing the proportion of the mixed solution.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to a method for preparing nano gold particles by generating hydrated electrons by laser. Background technique [0002] Nanogold refers to gold nanoparticles with a diameter of 1-100nm. Nanogold is widely used in industrial catalysis, biomedicine, Bioanalytical chemistry, food safety rapid detection and other fields have a wide range of applications. [0003] At present, the methods for preparing gold nanoparticles mainly include physical and chemical methods. Among the physical methods, the most common ones are vacuum evaporation method, soft landing method, laser ablation method, etc. The principle of the physical method is simple, and the obtained product has less impurities and high quality. Its disadvantages are that it requires high equipment and expensive production costs, and the size and shape of the obtained nano-gold particles are not easy to control. Chemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 叶满萍郑枭杜允
Owner CHINA JILIANG UNIV