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Gold nanorod self-assembly body as well as preparation method and application thereof

A gold nanorod and self-assembly technology, which is applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of cumbersome assembly process and long reaction time, achieve fast switching effect, stable product properties, and wide application prospects Effect

Active Publication Date: 2019-08-30
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the gold nanorod solution is prepared by this method, two steps of modification and assembly are required to obtain the assembly, and the reaction time is relatively long.
[0004] It is also reported in the prior art that the self-assembly of gold nanorods is mediated by reduced glutathione, but there is also the problem of cumbersome assembly process.

Method used

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  • Gold nanorod self-assembly body as well as preparation method and application thereof
  • Gold nanorod self-assembly body as well as preparation method and application thereof
  • Gold nanorod self-assembly body as well as preparation method and application thereof

Examples

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Embodiment 1

[0032] This embodiment provides a self-assembly of gold nanorods in a side-by-side mode, the preparation method of which comprises the following steps:

[0033] (1) Preparation of seed solution: under stirring, 0.25mL of 10mM HAuCl 4 The solution was added to 7.5 mL of 100 mM CTAB solution, followed by a rapid injection of 1.65 mL of deionized water and 0.6 mL of freshly prepared 1 mM NaBH on ice 4 solution, the resulting tan solution was stirred for an additional 1 min and aged at 30 °C for 2 h.

[0034] (2) Preparation of gold nanorod solution: 50 μL of 10 mM AgNO 3 Solution was added to 0.5 mL of 10 mM HAuCl 4Add 0.6 μL of 100 mM ascorbic acid (AA) to 10 mL of 100 mM CTAB mixed solution at 30°C under vigorous stirring (600 rpm) until the color becomes colorless, then quickly inject 12 μL of the seed solution, and the resulting mixed solution is released at 30 C overnight. The obtained Au NRs solution was centrifuged at 10,000 rpm for 10 minutes, and the gold nanorods we...

Embodiment 2

[0037] The present embodiment provides a tail-to-tail mode gold nanorod self-assembly body, and its preparation method comprises the following steps:

[0038] (1) Preparation of seed solution: under stirring, 0.25mL of 10mM HAuCl 4 The solution was added to 7.5 mL of 100 mM CTAB solution, followed by a rapid injection of 1.65 mL of deionized water and 0.6 mL of freshly prepared 1 mM NaBH on ice 4 solution, the resulting tan solution was stirred for an additional 1 min and aged at 30 °C for 2 h.

[0039] (2) Preparation of gold nanorod solution: 50 μL of 10 mMAgNO 3 The solution was added to 0.5 mL of 10 mM HAuCl 4 Add 0.6 μL of 100 mM ascorbic acid (AA) to 10 mL of 100 mM CTAB mixed solution at 30°C under vigorous stirring (600 rpm) until the color becomes colorless, then quickly inject 12 μL of the seed solution, and the resulting mixed solution is released at 30 C overnight. The obtained Au NRs solution was centrifuged at 10,000 rpm for 10 minutes, and the gold nanorods ...

Embodiment 3

[0042] This embodiment provides a self-assembly of gold nanorods in a side-by-side mode, the preparation method of which is the same as in Example 1, the difference being that the AgNO 3 The amount of solution added was changed from 50 μL to 60 μL.

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Abstract

The invention provides a gold nanorod self-assembly body as well as a preparation method and application thereof. The preparation method of the gold nanorod self-assembly body comprises the followingsteps of adding an ethylene diamine tetraacetic acid solution and a sodium hydroxide solution into a gold nanorod solution, and stirring the mixed solution for 20-40 seconds. According to the preparation method, the gold nanorod self-assembly body is prepared by adding the ethylene diamine tetraacetic acid solution and the sodium hydroxide solution into the gold nanorod solution and stirring the mixed solution, the modification and assembly are completed in one step, only 20-40 seconds are needed, so that the method is simple and rapid; the addition amount of the ethylene diamine tetraacetic acid solution and the addition amount of the sodium hydroxide solution can be adjusted, so that the gold nanorod self-assembly bodies with two modes of shoulder-by-shoulder and tail-to-tail are obtained, the product property is stable, and the application prospect is wide; and especially the various gold nanorod assembly bodies with different thermion service life can be prepared, the service lifeof thermions is modulated by changing the assembly structure, so that the property of the ultrafast optical switch is optimized.

Description

technical field [0001] The invention relates to the technical fields of material chemistry and optical materials, in particular to a gold nanorod self-assembly body and its preparation method and application. Background technique [0002] Plasmon-induced hot electrons are widely used in molecular imaging, photothermal therapy, optical switches, and optoelectronic devices due to their unique electrical, optical, and photothermal properties. Due to the potential application of hot electrons, research on plasmonic nanoparticles has become more and more extensive, especially the research on gold nanorods. Gold nanorod is a special anisotropic nanomaterial. It is a capsule-shaped gold nanoparticle whose size can be adjusted from several nanometers to hundreds of nanometers. It has unique surface plasmon resonance and good stability. And biocompatibility, has a wide range of application prospects. On the one hand, studying the lifetime of hot electrons is of great guiding signif...

Claims

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Application Information

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IPC IPC(8): B22F1/00B82Y30/00B82Y40/00G02B5/00
CPCB82Y30/00B82Y40/00G02B5/008B22F1/14
Inventor 费毅思李洪东王晓莉唐智勇
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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