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Method for preparing flower-like nanometer gold

A nano-gold, flower-like technology, applied in the field of nano-gold, can solve the problems of low yield, long reaction time, uneven particle size of gold nanoparticles, etc., and achieve easy separation, narrow particle size distribution, and easy control of morphology. Effect

Inactive Publication Date: 2010-07-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of gold nanoparticles prepared by these methods is not uniform, the yield is not high and the reaction time is long

Method used

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  • Method for preparing flower-like nanometer gold
  • Method for preparing flower-like nanometer gold
  • Method for preparing flower-like nanometer gold

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Measure 8mL of 0.2mM chloroauric acid solution, use 0.015M ascorbic acid as the reducing agent, stir and mix until the pH of the solution is 5.0, and react at room temperature for 24h to 10d. After the reaction, the samples were repeatedly washed with ultrapure water, centrifuged at 15,000 rpm, and the samples were collected. The reaction yields spherical nanoparticles, see figure 1 .

Embodiment 2

[0053] Measure 8mL of 0.2mM chloroauric acid solution, use 1.6mL of 1mg / mL trypsin solution (dispersed in ultrapure water) as reducing agent, stir and mix until the pH of the solution is 5.0, and react at room temperature for 10 days. After the reaction, the samples were repeatedly washed with ultrapure water, centrifuged at 15,000 rpm, and the samples were collected. The reaction yields spherical nanoparticles, see figure 2 .

Embodiment 3

[0055] Measure 8ml of 0.2mM chloroauric acid solution and 1.6mL of 1mg / mL trypsin solution (both dispersed in ultrapure water), stir and mix well, keep the volume ratio of chloroauric acid and trypsin at 5:1, and the solution The pH is 5.0; add a certain amount of 0.015M ascorbic acid to make the concentration of ascorbic acid 1.5mM, 2.0mM, 2.5mM, 3.0mM, stir and mix. React at room temperature for 5min to 24h. After the reaction, the samples were repeatedly washed with ultrapure water, centrifuged at 9000 rpm, and the samples were collected. The reaction obtains flower-shaped gold nanoparticles, see Figure 3-6 with Figures 9 to 13 .

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Abstract

The invention discloses a method for preparing flower-like nanometer gold, relating to nanometer gold. The invention provides a method for preparing the flower-like nanometer gold covered by trypsinase with higher stability, better biocompatibility and more uniform particles. The flower-like nanometer gold consists of nanometer particles and is covered by the trypsinase, and the particle diameter of the product is between 100 and 200nm with uniform shapes and particle diameters. Chloroauric acid is mixed with trypsinase solution to obtain a mixed liquid of the chloroauric acid and the trypsinase solution; ascorbic acid is added into the mixed liquid of the chloroauric acid and the trypsinase solution to obtain reaction solution; and the reaction product is collected and washed to obtain the product of the flower-like nanometer gold.

Description

technical field [0001] The present invention relates to a kind of nano-gold, especially relates to a kind of one-step controlled synthesis of flower-shaped nano-gold by using trypsin and chloroauric acid as raw materials, ascorbic acid as a reducing agent, and water as a solvent. Background technique [0002] As a typical mesoscopic system, nanoparticles have many unique properties different from bulk materials and individual molecules. As an extremely important member of the nanoparticle system, gold nanoparticles also have unique physical and chemical properties, such as good biocompatibility, making gold nanoparticles widely used in biomarkers and biosensing, and excellent electrical properties. , chemical properties make it used in electronic products and high-efficiency catalysts. At present, the preparation methods of nano gold mainly include: liquid phase reduction method, photochemical method, gas phase evaporation method, seed gold growth method, electrochemical re...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 翁建李林梅钟鹭斌
Owner XIAMEN UNIV
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