A kind of self-assembly of gold nanorods and its preparation method and application

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: 2021-06-25
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of self-assembly of gold nanorods and its preparation method and application
  • A kind of self-assembly of gold nanorods and its preparation method and application
  • A kind of self-assembly of gold nanorods and its preparation method and application

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 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 were...

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 and its preparation method and application. The preparation method of the gold nanorod self-assembly comprises adding ethylenediaminetetraacetic acid solution and sodium hydroxide solution to the gold nanorod solution, stirring 20‑40s. The present invention prepares the self-assembled gold nanorods by adding ethylenediaminetetraacetic acid solution and sodium hydroxide solution to the gold nanorods solution and stirring. The method completes the modification and assembly in one step, and only takes 20-40s, which is simple It is fast, and by adjusting the addition of ethylenediaminetetraacetic acid solution and sodium hydroxide solution, two modes of gold nanorod self-assembly, side-by-side and tail-to-tail, can be obtained. The product has stable properties and broad application prospects, especially for A variety of gold nanorod assemblies with different hot electron lifetimes were prepared, and the lifetime of hot electrons was modulated by changing the assembly structure, thereby optimizing the properties of ultrafast optical switches.

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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Patent Type & Authority Patents(China)
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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