Preparation method of gold nanoparticles as electron microscope developer and obtained gold nanoparticles

A technology of nano-gold particles and developer, applied in nanotechnology, nanotechnology, nanotechnology and other directions for sensing, can solve the problems of inhomogeneous particle size of nano-gold particles, large product differences, and inability to large-scale preparation, etc. The effect of uniform appearance, uniform size and long storage time

Pending Publication Date: 2021-12-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of small-sized gold spheres has the following problems: the particle size of gold nanoparticles is not uniform enough; it cannot be prepared on a large scale, and the products of different batches vary greatly

Method used

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  • Preparation method of gold nanoparticles as electron microscope developer and obtained gold nanoparticles
  • Preparation method of gold nanoparticles as electron microscope developer and obtained gold nanoparticles
  • Preparation method of gold nanoparticles as electron microscope developer and obtained gold nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method of gold nanoparticles as electron microscope developer, specifically comprising the steps of:

[0050] Dissolve 1g of chloroauric acid in deionized water, prepare 25mM chloroauric acid solution, and store in the dark at 4°C; dissolve 1.822g (5mmol) cetyltrimethylammonium bromide in 98mL of deionized water to obtain Cetyltrimethylammonium bromide solution (i.e. stabilizer solution), get the 25mM chloroauric acid solution of 2mL in the cetyltrimethylammonium bromide solution, fully stir and mix to obtain the precursor solution, The mol ratio of cetyltrimethylammonium bromide and chloroauric acid in the precursor solution is 100:1;

[0051] After dissolving 37.83mg of sodium borohydride in 10mL of deionized water at 0°C, use a pipette gun to take 2mL of it and add it to 98mL of deionized water to obtain a sodium borohydride solution;

[0052] Precursor solution and sodium borohydride solution (the molar ratio of chloroauric acid in the precursor solut...

Embodiment 2

[0055] A preparation method of gold nanoparticles as electron microscope developer, specifically comprising the steps of:

[0056] Dissolve 1g of chloroauric acid in deionized water to prepare a 25mM chloroauric acid solution, and store in the dark at 4°C; dissolve 1.822g of hexadecyltrimethylammonium bromide in 98mL of deionized water to obtain hexadecane Trimethyl ammonium bromide solution (i.e. stabilizer solution), take 2mM of 25mM chloroauric acid solution into cetyl trimethyl ammonium bromide solution, fully stir and mix to obtain a precursor solution, the precursor The mol ratio of cetyltrimethylammonium bromide and chloroauric acid in the body solution is 100:1;

[0057] After dissolving 37.83mg of sodium borohydride in 10mL of deionized water at 0°C, use a pipette gun to take 2mL of it and add it to 98mL of deionized water to obtain a sodium borohydride solution;

[0058] Precursor solution and sodium borohydride solution (the molar ratio of chloroauric acid in the p...

Embodiment 3

[0061] A preparation method of gold nanoparticles as electron microscope developer, specifically comprising the steps of:

[0062] Dissolve 1g of chloroauric acid in deionized water, prepare 25mM chloroauric acid solution, and store in the dark at 4°C; dissolve 1g of hexadecyltrimethylammonium bromide (2.7mmol) in 98mL of deionized water to obtain Cetyltrimethylammonium bromide solution (i.e. stabilizer solution), get the 25mM chloroauric acid solution of 2mL in the cetyltrimethylammonium bromide solution, fully stir and mix to obtain the precursor solution, The mol ratio of cetyltrimethylammonium bromide and chloroauric acid in the precursor solution is 54:1;

[0063] After dissolving 37.83mg of sodium borohydride in 10mL of deionized water at 0°C, use a pipette gun to take 2mL of it and add it to 98mL of deionized water to obtain a sodium borohydride solution;

[0064] Open the supergravity rotating device, adjust the rotor speed to 1000rpm; open the feed pump, adjust the f...

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Abstract

The invention discloses a preparation method of gold nanoparticles as an electron microscope developer and the obtained gold nanoparticles. According to the preparation method, chloroauric acid is used as a precursor material, hexadecyl trimethyl ammonium bromide is used as a stabilizer, sodium borohydride is used as a reducing agent, an oxidation-reduction reaction is carried out in a supergravity rotating packed bed, and the gold nanoparticles are obtained. The invention further provides the gold nanoparticles prepared by the preparation method. According to the preparation method of the gold nanoparticles, better process parameters are obtained by adjusting the feeding flow rate and the rotor rotating speed of the supergravity rotating packed bed, convenience and safety are achieved, continuous production can be achieved, the obtained gold nanoparticles are uniform in morphology and size, the particle size of the gold nanoparticles is 1-3 nm, and the size of the gold nanoparticles is smaller than that of common gold particles; and and the particles are good in dispersity and long in storage time.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials. More specifically, it relates to a preparation method of nano-gold particles as an electron microscope developer and the obtained nano-gold particles. Background technique [0002] Since E. Ruska and M. Knoll successfully developed the first transmission electron microscope (TEM) in 1932, human beings began to enter the nanometer world. The widespread use of electron microscopes and the rapid development of electron microscopy have greatly promoted the development of materials science. , physics, and life sciences. The electron beam transmitted through the sample carries the information of intensity, phase and periodicity. The information generated by the interaction between these electrons and matter is included in the TEM image, so that people can understand the microscopic world at the atomic scale. In order to reveal the evolution law and quantitative analysis of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24B82Y15/00B82Y40/00G01N11/00
CPCB22F9/24B82Y40/00B82Y15/00G01N11/00
Inventor 王丹胡珊鸣王洁欣初广文陈建峰
Owner BEIJING UNIV OF CHEM TECH
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