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Method for preparing multiple high-purity anisotropic gold nano particle

A gold nanoparticle and anisotropic technology, which is applied in the field of high-purity anisotropic gold nanoparticles and its preparation, can solve the problems of low purity and low yield of anisotropic gold nanoparticles, and achieves high purity and equipment. Low requirements and stable performance

Inactive Publication Date: 2007-03-28
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, almost all the reported preparation methods can only synthesize anisotropic gold nanoparticles with one morphology, and most of the anisotropic gold nanoparticles produced have low yield, especially the purity is not high.

Method used

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  • Method for preparing multiple high-purity anisotropic gold nano particle

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: the preparation of regular octahedral gold nanoparticles (Fig. 1a), its steps are:

[0011] (1) Prepare 60 ml of C in a covered reaction vessel 6 h 5 o 7 Na 3 2H 2 O (0.5wt%) aqueous solution (6.5wt%) / PVP (K30, 7.5wt%) / n-amyl alcohol (86wt%) multiple solution system;

[0012] (2) 1.5 ml HAuCl 4 4H 2 Add O (0.024M) ethanol solution into the system under stirring, continue to stir for 5 minutes, and then put it into a constant temperature box for heat treatment at 95°C for 24 hours;

[0013] (3) centrifuging the heat-treated reaction solution to obtain octahedral gold nanoparticles.

Embodiment 2

[0014] Embodiment 2: the preparation of acicular gold nanoparticles (Fig. 1e), the steps are:

[0015] (1) Prepare 60 ml of C in a covered reaction vessel 6 h 5 o 7 Na 3 2H 2 O (0.5wt%) aqueous solution (3wt%) / PVP (K30, 2.7wt%) / n-amyl alcohol (94.3wt%) multiple solution system;

[0016] (2) 1.5 ml HAuCl 4 4H 2 Add O (0.024M) ethanol solution into the system under stirring, continue to stir for 5 minutes, and then put it into a constant temperature box for heat treatment at 95°C for 24 hours;

[0017] (3) centrifuging the heat-treated reaction solution to obtain needle-shaped gold nanoparticles.

Embodiment 3

[0018] Embodiment 3: the preparation of gold nanoparticles, its steps are:

[0019] (1) Prepare 60 ml of C in a covered reaction vessel 6 h 5 o 7 Na 3 2H 2 O (0.05wt%) aqueous solution (7wt%) / PVP (K30, 10wt%) / n-amyl alcohol (83wt%) multiple solution system;

[0020] (2) 1.5 ml HAuCl 4 4H 2 Add O(2M) ethanol solution into the system under stirring, continue to stir for 30 minutes, and then put it into a constant temperature box for heat treatment at 100°C for 48 hours;

[0021] (3) centrifuging the heat-treated reaction solution to obtain needle-shaped gold nanoparticles.

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Abstract

The present invention relates to a preparation method of several kinds of high-purity anisotropic gold nano particles. Said method includes the following steps: (1), preparing multi-component solution system formed from (by wt%) 0.05-3% of aqueous solution of C6H5O7Na3.2H2O, PVP and n-pentanol in a reaction container with cover; (2), adding 0.05-2% of alcohol solution of HAuCl4.4H2O into the above-mentioned system under the condition of continuous stirring, placing said reaction container into a constant temperature oven to make heat treatment at 70-100deg.C; and (3), centrifugalizing the above-mentioned reaction solution undergone heat treatment so as to obtain the invented high-purity anisotropic gold nano particles.

Description

1. Technical field [0001] The invention relates to various high-purity anisotropic gold nanoparticles and a preparation method thereof. 2. Background technology [0002] Anisotropic gold nanoparticles have been widely used in the fields of optics, catalysis, biomedicine, and nanotechnology due to their unique morphology-related optical and electronic properties [1-8]. How to prepare high-purity anisotropic gold nanoparticles is the premise of realizing their good application in the above fields, and also the premise of exploring new properties and applications of gold nanoparticles. However, so far, almost all the reported preparation methods can only synthesize anisotropic gold nanoparticles with one morphology, and most of the anisotropic gold nanoparticles produced have low yield, especially the purity is not high. . {Document: [1] F.Kim, S.Connor, H.Song, T.Kuykendall, P.Yang, Angew.Chem.Int.Ed., 2004, 43, 3673.'J.E.Millstone, S.Park, K.L. Shuford, L.Qin, G.C.Schatz, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 章建辉刘淮涌王振林闵乃本
Owner NANJING UNIV
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