Preparation method of gold nano-particle aggregate material

A technology of gold nanoparticles and aggregates, applied in the field of nanomaterials, can solve the problems of inability to obtain gold nanoparticle aggregate materials and limit the application of gold nanoparticle aggregate materials

Pending Publication Date: 2021-12-10
中红外激光研究院(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above preparation method can only be used to prepare gold nanorods, and gold nanoparticle aggregate materials cannot be obtained, which limits the application of gold nanoparticle aggregate materials.

Method used

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  • Preparation method of gold nano-particle aggregate material
  • Preparation method of gold nano-particle aggregate material
  • Preparation method of gold nano-particle aggregate material

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Step 1: Prepare gold seed solution: first prepare a sodium borohydride solution with a concentration of 0.01M; an aqueous solution of ascorbic acid with a concentration of 0.1M; an aqueous solution of silver nitrate with a concentration of 4mM; an aqueous solution of chloroauric acid with a concentration of 5mM; Cetyltrimethylammonium bromide aqueous solution; concentration of 1.2M hydrochloric acid aqueous solution; concentration of 0.5M sodium hydroxide aqueous solution, after completion, add 0.6 ml of sodium borohydride aqueous solution to 4.5 ml of cetyltrimethylammonium bromide In the mixed solution of ammonium bromide aqueous solution and the chloroauric acid aqueous solution of 0.5 milliliters, form gold seed solution;

[0022] Step 2: Prepare growth solutions A, B, and C: Growth solutions A and B are a mixture of 0.9 milliliters of cetyltrimethylammonium bromide aqueous solution, 0.09 milliliters of chloroauric acid aqueous solution and 0.072 milliliters of ascor...

Embodiment 2

[0026]Step 1: Prepare gold seed solution: first prepare a sodium borohydride solution with a concentration of 0.01M; an aqueous solution of ascorbic acid with a concentration of 0.1M; an aqueous solution of silver nitrate with a concentration of 4mM; an aqueous solution of chloroauric acid with a concentration of 5mM; Cetyltrimethylammonium bromide aqueous solution; concentration of 1.2M hydrochloric acid aqueous solution; concentration of 0.5M sodium hydroxide aqueous solution, after completion, add 0.6 ml of sodium borohydride aqueous solution to 4.5 ml of cetyltrimethylammonium bromide In the mixed solution of ammonium bromide aqueous solution and the chloroauric acid aqueous solution of 0.5 milliliters, form gold seed solution;

[0027] Step 2: Prepare growth solutions A, B, and C: Growth solutions A and B are a mixture of 0.9 milliliters of cetyltrimethylammonium bromide aqueous solution, 0.09 milliliters of chloroauric acid aqueous solution and 0.072 milliliters of ascorb...

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Abstract

The invention discloses a preparation method of a gold nano-particle aggregate material. The preparation method comprises the following steps that firstly, a gold seed solution is prepared; a growth solution A, a growth solution B and a growth solution C are prepared, wherein the pH value of C is 5-7; finally, the gold seed solution is mixed with the growth solution A and the growth solution B, so that gold nano-seeds grow gradually; and then the gold seed solution is mixed with the growth solution C, monovalent gold ions are deposited on the surfaces of gold nano-seed particles to form gold nano-particles, silver nitrate is added into the growth solution C under the condition that the pH value is 5-7, nitrate ions are provided and combined with CTA <+> on the outer layer of gold, under the combined action of a surfactant (namely hexadecyl trimethyl ammonium bromide) and the silver nitrate, therefore, repulsion between adjacent head groups on the gold surface is reduced, and the gold nano-particles are aggregated to form the gold nano-particle aggregate material. The whole preparation process is carried out under the condition of normal temperature, heating or stirring is not needed, and chemical polymers or biomolecules do not need to be additionally introduced.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of a gold nanoparticle aggregate material. Background technique [0002] Nanoparticles refer to particles with a size between 1 and 100 nm, which exhibit novel properties different from bulk materials. Among them, gold nanoparticles have unique surface plasmon resonance optical properties, simple synthesis, easy surface modification, and good chemical stability. They have broad application prospects in optoelectronics, biomedicine, and other fields. research hotspot. [0003] The shape of gold nanoparticles has an important effect on their optical properties. According to reports, the localized surface plasmon resonance properties of gold nanoparticles cause optical absorption, scattering, and localized electromagnetic field enhancement, and the gold nanoparticle aggregate material composed of them can further increase the surface "h...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y5/00B82Y30/00B82Y40/00A61K41/00B22F1/00G01N21/65
CPCB22F9/24A61K41/0052B82Y40/00B82Y30/00B82Y5/00G01N21/658Y02W30/91
Inventor 沈德元王飞李敏
Owner 中红外激光研究院(江苏)有限公司
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