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A method for preparing gold nanodisks using amino acid as reducing agent

A technology for the preparation of amino acids and gold, which is applied in the field of preparation of two-dimensional gold nanodisks, achieving the effect of mild and controllable conditions and cost saving

Inactive Publication Date: 2016-07-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most of the reducing agents used in the above methods are ascorbic acid, etc., and the research on the preparation of two-dimensional planar gold nanodisks using alanine as a reducing agent has not yet been reported in public literature.

Method used

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  • A method for preparing gold nanodisks using amino acid as reducing agent
  • A method for preparing gold nanodisks using amino acid as reducing agent
  • A method for preparing gold nanodisks using amino acid as reducing agent

Examples

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Effect test

Embodiment 1

[0029] A method for preparing gold nanodiscs using amino acid as a reducing agent, the steps are as follows:

[0030] (1) Prepare sodium dodecyl sulfate (SDS, 25wt%)-alanine (0.8wt%)-chloroauric acid (HAuCl 4 , 0.03M aqueous solution) system, put it into a 25°C incubator after mixing, and react for 72h;

[0031] (2) Dilute the reaction system with water, centrifuge, remove the supernatant, and collect the precipitate to obtain the product. The main product obtained by transmission electron microscopy is a two-dimensional gold nanodisk, and a small amount of spherical particles, in which the gold nanodisk is in the shape of an equilateral triangle or hexagon. shape, with a side length of 1-3 microns and a thickness of 2-10 nm.

Embodiment 2

[0033] A method for preparing gold nanodiscs using amino acid as a reducing agent, the steps are as follows:

[0034] (1) Prepare sodium dodecyl sulfate (SDS, 35.5wt%)-alanine (1.2wt%)-chloroauric acid (HAuCl 4 , 0.03M aqueous solution) system, put it into a 25°C incubator after mixing, and react for 72h;

[0035] (2) Dilute the reaction system with water, centrifuge, remove the supernatant, and collect the precipitate to obtain the product. The main product obtained through transmission electron microscope observation is a two-dimensional gold nanodisk, wherein the gold nanodisk is in the shape of a regular triangle or hexagon, and the side length is 1.5-3 microns, thickness 2-10nm.

Embodiment 3

[0037] A method for preparing gold nanodiscs using amino acid as a reducing agent, the steps are as follows:

[0038] (1) Prepare sodium dodecyl sulfate (SDS, 45wt%)-alanine (1.5wt%)-chloroauric acid (HAuCl 4 , 0.03M aqueous solution) system, put it into a 25°C incubator after mixing, and react for 72h;

[0039] (2) Dilute the reaction system with water, centrifuge, remove the supernatant, and collect the precipitate to obtain the product. The main product obtained through transmission electron microscope observation is a two-dimensional gold nanodisk, wherein the gold nanodisk is in the shape of a regular triangle or hexagon, and the side length is 1-2 microns, thickness 2-5nm.

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Abstract

The invention discloses a method for preparing gold nano discs by using amino acid as a reducing agent. The method comprises the following steps: using an anionic surfactant-amino acid-auric acid chlorate mixed system as a reaction system, and reacting at room temperature to obtain a two-dimensional planar gold nano disc. The method of the invention has the characteristics of simple and easy reaction system and mild conditions; the reducing agent is a biomolecule and has the characteristics of environmental friendliness; the product appearance and particle size are controllable, the output is large and the structure is clear, and the like.

Description

technical field [0001] The invention relates to a preparation method of a two-dimensional gold nanodisk, in particular to a method for preparing a gold nanodisk by using amino acid as a reducing agent. Background technique [0002] Noble metal nanoparticles with anisotropic geometry, especially one-dimensional or two-dimensional gold nanoparticles, exhibit different optical absorption and emission spectral properties from spherical particles and bulk materials, such as metal-enhanced fluorescence, surface-enhanced Raman scattering, It has great application value in the fields of media sensing, cancer hyperthermia, drug release control, nano-optical imaging, and local electromagnetic field enhancement. [0003] At present, many effective methods have been developed for two-dimensional gold nanodisks or sheets, mainly including template method, hydrothermal synthesis method and seed growth method. The soft template method is mainly to add functionalized surfactants and additi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 王庐岩
Owner UNIV OF JINAN
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