Sea-urchin-shaped gold nano particles and synthesis method thereof

A gold nanoparticle and synthesis method technology, applied in the field of sea urchin-shaped gold nanoparticle and its synthesis, to achieve the effects of good repeatability, strong shape controllability, and good application potential

Inactive Publication Date: 2019-07-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of sea urchin-like gold nanoparticles with tunable size, surface spine density, length, and width through a green and simple process remains a great challenge.

Method used

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  • Sea-urchin-shaped gold nano particles and synthesis method thereof
  • Sea-urchin-shaped gold nano particles and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A synthetic method of sea urchin-shaped gold nanoparticles, comprising the steps of:

[0021] (1) The required raw materials soluble silver source (silver nitrate), soluble gold source 1 (chloroauric acid), soluble gold source 2 (chloroauric acid) and weak reducing agent (ascorbic acid) were prepared into solutions using ultrapure water. Wherein, the concentration of soluble silver source (silver nitrate) solution is 0.1mol / L, the concentration of soluble gold source one (chloroauric acid) is 0.1mol / L, and the concentration of soluble gold source two (chloroauric acid) is 3mmol / L , the concentration of weak reducing agent (ascorbic acid) is 10mmol / L.

[0022] (2) Vigorously mix 2 μL soluble silver source (silver nitrate) solution and 2 μL soluble gold source-(chloroauric acid) solution in a glass bottle (the molar ratio of silver source to gold source-1 is 1:1), and quickly add 1mL of weak reducing agent (ascorbic acid) solution was vigorously stirred for 5s, then quic...

Embodiment 2

[0028] This embodiment is similar to Embodiment 1. The variables in Embodiment 1 are fixed and other variables are changed, including the following steps:

[0029] (1) The required raw materials soluble silver source (silver nitrate), soluble gold source 1 (chloroauric acid), soluble gold source 2 (chloroauric acid) and weak reducing agent (ascorbic acid) were prepared into solutions using ultrapure water. Wherein, the concentration of soluble silver source (silver nitrate) solution is 0.1mol / L, the concentration of soluble gold source one (chloroauric acid) is 0.1mol / L, and the concentration of soluble gold source two (chloroauric acid) is 3mmol / L respectively. L, the concentration of weak reducing agent (ascorbic acid) is 10mmol / L.

[0030] (2) Vigorously mix 2 μL soluble silver source (silver nitrate) solution and 8 μL soluble gold source-(chloroauric acid) solution in a glass bottle (the molar ratio of silver source to gold source-1 is 1:4), and quickly add 1mL of weak re...

Embodiment 3

[0036] This embodiment is similar to Embodiment 1 and 2, fixing the variables in Embodiment 1 and 2, changing other variables, including the following steps:

[0037] (1) The required raw materials soluble silver source (silver nitrate), soluble gold source 1 (chloroauric acid), soluble gold source 2 (chloroauric acid) and weak reducing agent (ascorbic acid) were prepared into solutions using ultrapure water. Wherein, the concentration of soluble silver source (silver nitrate) solution is 0.1mol / L, the concentration of soluble gold source one (chloroauric acid) is 0.1mol / L, and the concentration of soluble gold source two (chloroauric acid) is 0mmol / L respectively L, 1mmol / L, 2mmol / L, 3mmol / L, 4mmol / L, the concentration of the weak reducing agent (ascorbic acid) is 10mmol / L.

[0038] (2) Vigorously mix 2 μL soluble silver source (silver nitrate) solution and 2 μL soluble gold source-(chloroauric acid) solution in a glass bottle (the molar ratio of silver source to gold source-...

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Abstract

The invention belongs to the technical field of nano material preparing. A sea-urchin-shaped gold nano particle synthesis method comprises the following steps that firstly, a soluble silver source anda soluble gold source are evenly mixed, a weak reducing agent is rapidly added, stirring is conducted for a certain time, and a silver/gold seed with the rough surface is obtained; and secondly, thesilver/gold seed and a certain number of gold sources are mixed, and after stirring is conducted for 20 s, centrifugal separation is conducted, the mixture is scattered into deionized water again, andsea-urchin-shaped gold nano particles are obtained. By means of the method, the sea-urchin-shaped gold nano particles high in yield and adjustable in particle size and surface spine density, length and width can be obtained. The gold nano particles with different spine structures have different ultraviolet-visible absorption spectra, and adjustable red shift of an LSPR peak can be shown. In addition, the gold nano particles, namely the sea-urchin-shaped gold nano particles different in spine structure can have different degrees of enhancing functions on raman signals. The method has good application potentials on surface enhanced raman scattering.

Description

technical field [0001] The invention relates to a sea urchin-shaped gold nano particle with adjustable size and adjustable surface thorn density, length and width and a synthesis method thereof, belonging to the technical field of nano material preparation. Background technique [0002] Nanostructured materials are referred to as nanomaterials for short, which means that the size of their structural units is between 1 nanometer and 100 nanometers, and they are in the transition zone between atomic clusters and macroscopic objects. They are a typical mesoscopic system. Its scale is close to the wavelength of light, and it has a special effect of a large surface, so its properties, such as melting point, magnetism, optics, thermal conductivity, electrical conductivity, etc., are often different from those of the substance in its overall state nature. Therefore, the preparation technology and application of nanomaterials have attracted much attention. [0003] Currently, nobl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/0553B22F1/07B22F1/054
Inventor 徐晖李圆圆
Owner NANJING UNIV OF TECH
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