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Preparation method of gold nanotriangular sheet and method for preparing gold nanodisc and gold nanohexagonal sheet based on the method

A technology of gold nano and hexagonal sheets, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of many impurities, poor size uniformity of gold nanosheets, and low yield, and achieve a size Good controllability, great application value, simple and convenient operation

Active Publication Date: 2017-04-12
NANOSEEDZ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the technical problems of the existing gold nanosheet preparation method mentioned in the above background technology, the prepared gold nanosheets have disadvantages such as poor size uniformity, low yield, and many impurities. The purpose of the present invention is to provide an easy-to-operate , Highly reproducible and efficient preparation method of gold nanotriangular sheets

Method used

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  • Preparation method of gold nanotriangular sheet and method for preparing gold nanodisc and gold nanohexagonal sheet based on the method
  • Preparation method of gold nanotriangular sheet and method for preparing gold nanodisc and gold nanohexagonal sheet based on the method
  • Preparation method of gold nanotriangular sheet and method for preparing gold nanodisc and gold nanohexagonal sheet based on the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Prepare gold nanotriangular sheets according to the following steps:

[0053] 1. Preparation of nano gold seed solution:

[0054] Add 1mL of 0.01M sodium citrate aqueous solution to 36mL of deionized water, mix well, add 1mL of 0.01M tetrachloroauric acid aqueous solution, mix well, add 1mL of 0.1M sodium borohydride (analytical pure) Aqueous solution (prepared before use, stored in an ice-water bath), mixed vigorously to make the solution fully mixed, and left to stand at room temperature for 2 hours to obtain a nano-gold seed solution.

[0055] 2. Preparation of gold nanotriangular sheets:

[0056] To 40mL concentration of 0.05M cetyltrimethylammonium bromide aqueous solution, add 2mL concentration of 0.01M tetrachloroauric acid aqueous solution, 0.4mL concentration of 0.01M potassium iodide solution and 0.8mL concentration of 0.1M hydrogen Sodium oxide aqueous solution, after mixing evenly, add 0.32mL of ascorbic acid aqueous solution with a concentration of 0.1M, ...

Embodiment 2

[0058] Prepare gold nanotriangular sheets according to the following steps:

[0059] In this example, except that the concentration of cetyltrimethylammonium bromide aqueous solution added in step 2 is 0.1M, the remaining steps are the same as in Example 1, and the purity of the obtained gold nanotriangular sheets is 85%.

Embodiment 3

[0061] Prepare gold nanotriangular sheets according to the following steps:

[0062] In this example, except that the concentration of cetyltrimethylammonium bromide aqueous solution added in step 2 is 0.075M, the remaining steps are the same as in Example 1, and the purity of the obtained gold nanotriangular sheets is 90%.

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Abstract

The invention provides a gold nanoparticle triangular plate preparing method and a method for preparing gold nanoparticle discs and gold nanoparticle hexagonal pieces on the basis of the gold nanoparticle triangular plate preparing method, relates to the technical field of gold nanoparticle preparing, and aims at providing the method which is easy and convenient to operate, high in repeatability and efficiency and is used for preparing gold nanoparticle triangular plates, gold nanoparticle discs and gold nanoparticle hexagonal pieces. The gold nanoparticle triangular plate preparing method includes the steps of preparing a gold nanoparticle seed solution through a sodium citrate aqueous solution, a tetrachloroauric acid aqueous solution and a sodium borohydride aqueous solution, preparing a gold nanoparticle triangular plate solution through the preapraed seed solution, a cetyl trimethyl ammonium bromide aqueous solution, a tetrachloroauric acid aqueous solution, a potassium iodide or sodium iodide aqueous solution, a sodium hydroxide aqueous solution and a ascorbic acid aqueous solution, and obtaining gold nanoparticle triangular plates after the liquid supermatant is abandoned. The method is easy and convenient to operate and high in repeatability and controllability, the prepared gold nanoparticle plates are unified in size, gold nanoparticle plates of different types and sizes can be synthesized, and the purity reaches 95% or higher.

Description

technical field [0001] The invention relates to the technical field of preparation of gold nanoparticles, in particular to a method for preparing gold nano-triangular sheets, gold nano-discs and gold nano-hexagonal sheets based on a seed-mediated method. Background technique [0002] Gold is a noble metal material with very stable chemical properties. Gold nanoparticles inherit this property of its bulk material, so it has relatively stable but very rich chemical and physical properties. Gold nanoparticles have a very high surface electric field strength enhancement effect, a large optical absorption and scattering cross section, and a wide range of continuously adjustable photothermal conversion efficiency. Due to its unique optical, photoelectric, photothermal, photochemical, and molecular biological properties, gold nanoparticles are receiving intense attention in the material science community, and have attracted many materials scientists, biochemists, medical scientists...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
Inventor 秦风阮琦锋陈星求王建方
Owner NANOSEEDZ
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