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Preparation method of Au (gold) nanoparticle with polyhedral structure

A polyhedral structure and nanoparticle technology, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problems of restricting wide application and easy oxidation, and achieve controllable structure, improved thermodynamic growth, strong localization The effect of Raman enhancement effect

Active Publication Date: 2018-11-16
东营睿港招商服务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Ag nanoparticles have a better reinforcing effect, their wide application is limited due to their active nature and easy oxidation.

Method used

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  • Preparation method of Au (gold) nanoparticle with polyhedral structure
  • Preparation method of Au (gold) nanoparticle with polyhedral structure
  • Preparation method of Au (gold) nanoparticle with polyhedral structure

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of polyhedral junction Au nanoparticles, comprising the following steps:

[0032] Step 1, the HAuCl 4 Add the solution to CTAB to form an aqueous solution and mix well, then add a certain amount of NaBH 4 Soak for 30-60 minutes and set aside;

[0033] Step 2, a certain amount of CTAB, sodium oleate, AgNO 3 , HAuCl 4 Dissolve in water and mix well, let stand for 10-30min;

[0034] Step 3, slowly adding a certain amount of hydrochloric acid into the mixed solution of step 2, and then adding a certain amount of ascorbic acid solution;

[0035] Step 4: Take a certain amount of crotonic acid and BDAC and add it to the mixed solution in Step 3, then add the precursor solution in Step 1 to mix, then let it stand at a constant temperature, and wash it by centrifugation to prepare polyhedral Au nanoparticles.

[0036] Specifically, in step 1, prepare 5ml of CTAB with a concentration of 0.5M, and add 0.7mM HAuCl 4 solution 5ml, mix the two evenly, and a...

Embodiment 2

[0042] A preparation method of polyhedral structure Au nanoparticles, comprising the following steps:

[0043] Specifically, in step 1, prepare 5ml of CTAB with a concentration of 0.5M, and add 1mM HAuCl 4 solution 5ml, mix the two evenly, and add 25ml of NaBH with a concentration of 0.05M 4 Solution, soak for 50min to form a mixed solution 1, stand-by;

[0044] In step 2, dissolve 7g of CTAB and 1g of sodium oleate in 200ml of water, mix well, and add 15mg of AgNO 3 and 10 ml of 0.5 mM HAuCl 4, standing for 20min to form mixed solution 2;

[0045] In step 3, 5 ml of hydrochloric acid with a concentration of 10 mol / L and 5 ml of ascorbic acid with a concentration of 2 mM are added to the solution in step 2 for mixing;

[0046] In step 4, take 200 μl of crotonic acid with a concentration of 10M and 10ml of BDAC with a concentration of 20mM, add the corresponding crotonic acid and BDCA to the mixed solution in step 3, then add the precursor solution in step 1 and mix The po...

Embodiment 3

[0049] A preparation method of polyhedral structure Au nanoparticles, comprising the following steps:

[0050] Specifically, in step 1, prepare 5ml of CTAB with a concentration of 0.5M, and add 0.7mM HAuCl 4 solution 5ml, mix the two evenly, and add 25ml of NaBH with a concentration of 0.05M 4 Solution, soak for 50min to form a mixed solution 1, stand-by;

[0051] In step 2, dissolve 7g of CTAB and 1g of sodium oleate in 200ml of water, mix well, and add 15mg of AgNO 3 and 10 ml of 0.5 mM HAuCl 4 , standing for 20min to form mixed solution 2;

[0052] In step 3, take 5ml of hydrochloric acid with a concentration of 5mol / L, and 5ml of ascorbic acid with a concentration of 2mM, add to the solution in step 2 and mix;

[0053] In step 4, take 200 μl of crotonic acid with a concentration of 10M and 10ml of BDAC with a concentration of 20mM, add the corresponding crotonic acid and BDCA to the mixed solution in step 3, then add the precursor solution in step 1 and mix The polyhe...

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Abstract

The invention relates to a preparation method of Au (gold) nanoparticles with a polyhedral structure. The preparation method of the Au nanoparticles with the polyhedral structure includes the steps of: (1) adding an HAuCl4 (gold chloride) solution to CTAB (cetyltrimethyl ammonium bromide) to form a water solution, mixing evenly and adding a certain amount of NaBH4 (sodium borohydride) and soakingfor 30 to 60 minutes; (2) dissolving a certain amount of CTAB, sodium oleate, AgNO3 (silver nitrate) and HAuCl4 in water, mixing well and then letting stand for 10 to 30 minutes; (3) slowly adding a certain amount of hydrochloric acid to the mixed solution of step (2), and then adding a certain amount of an ascorbic acid solution; (4) adding a certain amount of butenoic acid and BDAC (benzyl dimethyl ammonium chloride) to the mixed solution of step (3), and then adding a precursor solution of step (1), mixing, then letting stand and washing centrifugally to obtain the Au nanoparticles with thepolyhedral structure. The prepared Au nanoparticles with the polyhedral structure have the advantages of having controllable structure, good dispersion, uniform particle size, high stability and sharp edges and corners with Au particles of other shapes not produced, and producing strong local Raman enhancement effect.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer materials, and in particular relates to a method for preparing Au nanoparticles with a polyhedral structure. Background technique [0002] Noble metal nanoparticles, in the visible and near-infrared bands, have plasmon resonances with tunable shape and size, which is a very good material. Plasmon resonance is used to enhance many processes including Raman scattering, infrared absorption and fluorescence. The luminescence of ordinary fluorescent materials is affected by both brightness saturation and luminescence fading, which limits their own applications. Noble metal nanoparticles with plasmons can solve this problem well. The tunable absorption and scattering enhancement spectra of noble metal nanoparticles make them have the opportunity to be applied in biosensing, bioimaging, medical treatment, etc., and replace traditional materials such as chromophores and fluoresceins. Gold and sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00B22F1/00
CPCB82Y40/00B22F9/24B22F1/054
Inventor 张贤芝
Owner 东营睿港招商服务有限责任公司
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