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Method for preparing gold nanorods

A technology of gold nanorods and seeds, applied in the field of preparation of nanomaterials, can solve the problems of low reproducibility, poor quality of gold nanorods, severe operating requirements and experimental conditions, and achieve high yield and high consistency. Effect

Inactive Publication Date: 2015-09-16
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the poor quality of the gold nanorods obtained by the existing method, and the operating requirements and experimental conditions are relatively strict, and the reproducibility is low, and the preparation of a high-quality gold nanorod is provided. method

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  • Method for preparing gold nanorods
  • Method for preparing gold nanorods

Examples

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Effect test

Embodiment 1

[0052] A. Preparation of growth solution: Weigh 7.0 g of cationic surfactant CTAB and 1.234 g of sodium oleate and dissolve in 250 mL of ultrapure water, heat and stir at 50 °C until completely dissolved. This process lasts for 1 hour. Vigorous stirring is not suitable during this process, and the degree of stirring is subject to the fact that the solution does not foam; then cool down to 30 °C, add 18 mL of 4 mM silver nitrate solution, stir slowly for 30 s, and stand at 30 °C for 15 minutes to achieve equilibrium ; followed by the addition of 250 mL of 1 mM HAuCl 4 solution, keep stirring for 90 minutes until the solution turns from golden yellow to clear; add 1.5 mL of concentrated hydrochloric acid with a mass fraction of 37 %, and stir slowly for 15 minutes to reach equilibrium; finally add 1.25 mL of 0.064 M ascorbic acid, and stir rapidly for 30 s , that is, the growth solution is prepared.

[0053] B. Preparation of seed solution: Weigh 0.3645 g cetyltrimethylammonium...

Embodiment 2

[0056] A. Preparation of growth solution: Weigh 9.0 g of cationic surfactant CTAB and 1.543 g of sodium oleate to dissolve in 250 mL of ultrapure water, heat and stir at 50 °C until completely dissolved, and this process lasts for about 1 hour. During this process, it is not advisable to stir violently, and the degree of stirring is subject to the fact that the solution does not foam; then cool down to 30 °C, add 18 mL of 4 mM silver nitrate solution, stir slowly for 30 s, and stand at 30 °C for 15 minutes or less. Equilibrium was reached; followed by the addition of 250 mL of 1 mM HAuCl 4 solution, keep stirring for 90 minutes until the solution turns from golden yellow to clear; add 1.5 mL of concentrated hydrochloric acid with a mass fraction of 37 %, and stir slowly for 15 minutes to reach equilibrium; finally add 1.25 mL of 0.064 M ascorbic acid, and stir rapidly for 30 After s, the growth solution is prepared;

[0057] B, the preparation of seed solution: same as embodi...

Embodiment 3

[0060] A. Preparation of growth solution: Weigh 9.0 g of cationic surfactant CTAB and 1.543 g of sodium oleate to dissolve in 250 mL of ultrapure water, heat and stir at 50 °C until completely dissolved, and this process lasts for about 1 hour. During this process, it is not advisable to stir violently, and the degree of stirring is subject to the fact that the solution does not foam; then cool down to 30 °C, add 18 mL of 4 mM silver nitrate solution, stir slowly for 30 s, and stand at 30 °C for 15 minutes or less. Equilibrium was reached; followed by the addition of 250 mL of 1 mM HAuCl 4 solution, keep stirring for 90 minutes until the solution turns from golden yellow to clear; add 2.1 mL of concentrated hydrochloric acid with a mass fraction of 37 %, and stir slowly for 15 minutes to reach equilibrium; finally add 1.25 mL of 0.064 M ascorbic acid, and stir rapidly for 30 After s, the growth solution is prepared;

[0061] B, the preparation of seed solution: identical with...

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Abstract

The invention discloses a method for preparing gold nanorods and belongs to the field of nano material preparing. The method includes the following steps that firstly, a mixed solution of quaternary ammonium bromide, oleate, chloroauric acid hydrated, silver nitrate, an acid solution and ascorbic acid is prepared, and a growth solution is obtained; secondly, in a cetyl trimethyl ammonium bromide surface modifying solution, strong reductant sodium borohydride is used for restoring the chloroauric acid hydrated to obtain a gold seed solution; thirdly, the gold seed solution is injected into the growth solution for reaction for 3-15 hours, and the gold nanorods are obtained. The method for preparing the gold nanorods has the advantages that the requirement for equipment is low, the method is easy to operate, conditions are gentle, reproducibility is high, and large-batch preparing can be conducted; the obtained gold nanorods are high in yield which can reach 99 percent or higher, consistency is high, the variable coefficient of length and the variable coefficient of width are within 10 percent, the length-diameter ratio can be regulated in the large range of 1.5-8, and a solid foundation is laid for practical use of the gold nanorods.

Description

technical field [0001] The invention relates to the field of preparation of nanomaterials, in particular to a method for preparing gold nanorods. Background technique [0002] Gold nanomaterials have become research and application hotspots in optics, electronics, catalysis, and biomedicine because of their obvious surface effects, quantum effects, small size effects, and biological affinity. Gold is a noble metal material with very stable chemical properties. Gold nanoparticles inherit this property of its bulk material, so it has the characteristics of relatively stable and rich chemical and physical properties. The unique physical and chemical properties of gold nanoparticles are strongly related to their morphology. The research on metal nanoparticles, especially the controllable preparation of their morphology and their corresponding properties and applications, has always been a frontier hotspot in materials science and related fields. . [0003] In recent years, gol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 冯苗洪暂发詹红兵
Owner FUZHOU UNIV
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