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Capsule gold nano particles with double adsorbing property in visible light region and synthesizing method thereof

A nanoparticle and absorption performance technology, which is applied in the field of encapsulated gold nanoparticles and their synthesis, achieves the effects of uniform particle size, simple and easy operation, and high yield.

Inactive Publication Date: 2017-06-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on gold nanoparticles with multiple absorption properties for visible light and their preparation methods.

Method used

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  • Capsule gold nano particles with double adsorbing property in visible light region and synthesizing method thereof
  • Capsule gold nano particles with double adsorbing property in visible light region and synthesizing method thereof
  • Capsule gold nano particles with double adsorbing property in visible light region and synthesizing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of Capsule-shaped Gold Nanoparticles with Aspect Ratio of 1:1

[0024] First add polydiallyldimethylammonium chloride (PDDA, Mw=100000-200000, 20 wt%) aqueous solution to the ethylene glycol solution, stir well to obtain a mixed solution; then add chlorine to the mixed solution in sequence Auric acid (HAuCl4), silver nitrate (AgNO3) and a small amount of ferric chloride (FeCl3) aqueous solution were used to obtain a reaction precursor solution to prepare gold nano-decahedron seeds, wherein the size of the gold nano-decahedron was 30 nanometers. Then polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl4), and ascorbic acid (AA) were added to the gold nanodecahedral seeds, wherein polydiallyldimethylammonium chloride ( The concentrations of PDDA), chloroauric acid (HAuCl4), ascorbic acid (AA) and gold nanodecahedral seeds in the precursor solution were 0.025 mol / L, 0.0005 mol / L, 0.0007 mol / L, 0.000125 mol / L; The reaction solution was placed at...

Embodiment 2

[0026] Preparation of Capsule-shaped Gold Nanoparticles with Aspect Ratio of 7:6

[0027] Add ascorbic acid (AA) to the reaction vessel in advance, then add polydiallyldimethylammonium chloride (PDDA, Mw=100000-200000, 20 wt%) ethylene glycol solution, stir well and get a mixed solution ; Then add chloroauric acid (HAuCl4) and gold nanometer decahedron seed solution in sequence to obtain a reaction precursor solution, in which polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl4), ascorbic acid (AA), the concentrations of gold nano-decahedral seeds in the precursor solution are 0.025 mol / L, 0.0005 mol / L, 0.0008 mol / L, 0.000125 mol / L; subsequently, the reaction precursor solution is placed at room temperature React in medium for 1 hour to obtain a red colloid solution. After centrifuging at a speed of 13,000 rpm for 30 minutes with a high-speed centrifuge, remove the colorless solution in the centrifuge tube to obtain a precipitated product; then ultrasonically...

Embodiment 3

[0029] Preparation of Capsule-shaped Gold Nanoparticles with Aspect Ratio of 3:2

[0030] First add ascorbic acid (AA) as a reducing agent into the reaction vessel; then add polydiallyldimethylammonium chloride (PDDA, Mw=100000-200000, 20 wt%) ethylene glycol to the reducing agent in sequence Solution, chloroauric acid (HAuCl4), gold nano-decahedron seeds, to obtain the reaction precursor solution, in which polydiallyldimethylammonium chloride (PDDA), chloroauric acid (HAuCl4), ascorbic acid (AA), The concentrations of the gold nano-decahedral seeds in the precursor solution are 0.025 mol / L, 0.0005 mol / L, 0.0009 mol / L, and 0.000125 mol / L; subsequently, the reaction precursor solution was placed in room temperature for 1 hour , to obtain a red colloidal solution, use a high-speed centrifuge to centrifuge at 12,000 rpm for 30 minutes, remove the colorless solution in the centrifuge tube, and obtain a precipitated product; then use deionized water to ultrasonically clean the precip...

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Abstract

The invention relates to capsule gold nano particles with a double adsorbing property in a visible light region and a preparation method thereof. The capsule gold nano particles have the characteristics of being uniform in size, good in dispersibility and the like. The ratio of length to diameter of the nanoparticles can be effectively regulated within a range of 1: 1 to 5:2. The preparation method comprises the following steps: (1) preparing gold nanodecanedrons different in size in ethylene glycol by virtue of a polyhydric alcohol reduction method by taking poly diallyldimethylammonium chloride as a stabilizer and a morphological control agent; and (2) in a stirring condition, adding a certain amount of a gold decanedron nanoparticle colloidal solution into an ethylene glycol solution comprising poly diallyldimethylammonium chloride, chloroauric acid and ascorbic acid, and performing a reaction at a temperature of 0-100 DEG C for 30-180 minutes to obtain the capsule gold nanoparticle colloidal solution. The capsule gold nanoparticles obtained by the invention has a double adsorbing property in the visible light region, and has important application value and a wide application prospect in the aspects of solar utilization, photothermal conversion, biological / chemical sensing, medical diagnosis and the like.

Description

technical field [0001] The invention relates to a capsule-shaped gold nanoparticle with double absorption performance in the visible light region and a synthesis method thereof. Background technique [0002] Noble metal gold nanoparticles have very unique light absorption properties and good stability. These characteristics make them have important application value and broad application prospects in solar energy utilization, photothermal conversion, photothermal therapy, biological / chemical sensing, medical diagnosis, information storage, etc. Studies have shown that the size, shape and other structural factors of gold nanoparticles will have an important impact on their performance and application. Therefore, the controllable preparation of gold nanoparticles with different sizes and shapes is of great significance for the research of their physical properties and application development. Compared with the solid-phase and gas-phase methods, the liquid-phase method not on...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0553B22F1/054
Inventor 张涛李村成姜春雪韩晓楠刘广宁
Owner UNIV OF JINAN
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