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Gold nanorod with high yield and great slenderness ratio and preparation method of gold nanorod

A technology of gold nanorods and large aspect ratio, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc. It can solve the problems that are difficult to precisely control and stop, and unfavorable for the large-scale application of gold nanorods , to achieve the effects of inhibiting material exchange, inhibiting lateral growth, and good controllability

Inactive Publication Date: 2013-03-13
NANOSEEDZ
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the highest yield of gold nanorods prepared by the reported three-step method is less than 50%, and multi-step purification is required, which is not conducive to the large-scale application of gold nanorods; The gold nanorods with bulk resonance wavelength need to be adjusted after the synthesized gold n

Method used

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  • Gold nanorod with high yield and great slenderness ratio and preparation method of gold nanorod
  • Gold nanorod with high yield and great slenderness ratio and preparation method of gold nanorod
  • Gold nanorod with high yield and great slenderness ratio and preparation method of gold nanorod

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0027] Example 1

[0028] First prepare the following solutions:

[0029] 1. 0.1M cetyltrimethylammonium bromide aqueous solution: Weigh 14.6g cetyltrimethylammonium bromide (analytical purity) and dissolve it in 400mL deionized water, heat it to fully dissolve and form colorless and transparent Solution.

[0030] 2. 0.1M hexadecyltributylammonium bromide aqueous solution: Weigh 0.98g cetyltributylammonium bromide (analytical purity) and dissolve it in 100mL deionized water. Heat to fully dissolve to form a colorless transparent solution.

[0031] 3. 0.01M tetrachloroauric acid aqueous solution: Weigh 0.393g of tetrachloroauric acid (analytical purity) and dissolve it in 100 mL of deionized water.

[0032] 4. 0.01M silver nitrate aqueous solution: Weigh 0.17g silver nitrate (analytical grade) and dissolve it in 100mL deionized water, and store in the dark.

[0033] 5. 1M aqueous hydrochloric acid solution: Weigh 2mL of 5M hydrochloric acid solution (analytical grade) and add 8mL deioni...

Example Embodiment

[0045] Example 2-6: The effect of cetyltributylammonium bromide concentration on the growth of gold nanorods.

Example Embodiment

[0046] Example 2

[0047] In this example, except that the volume of cetyltributylammonium bromide added was 6mL (the final concentration of cetyltributylammonium bromide was 0.015M), the rest of the steps were the same as in Example 1, to obtain The longitudinal surface plasmon resonance wavelength of the gold nanorods is 1067 nm ( figure 1 , Line 6).

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Abstract

The invention provides a gold nanorod with high yield and great slenderness ratio and a preparation method of the gold nanorod. A small number of hexadecylamine type cation surfactant ingredients with greater head groups are added into growth solution of the traditional seed growth method, the hexadecyl trimethyl ammonium bromide double-layer structure adsorbed on the surface of a gold rod can be partially substituted in the growth process through the ingredient addition, and the greater heat groups can tightly wrap the gold nanorod, so the substance exchange between the naked side surface of the gold nanorod and the growth solution is effectively inhabited, because the top point of the gold rod has greater curvature, the influence of the wrapping effect on the growth is less, and the slender gold nanorod with great slenderness ratio is obtained. For the continuous adjustment of the resonant wavelength of plasmas at the longitudinal surface of the synthesized gold nanorod, chloroauric acid hydrated is adopted as an oxidant so that the gold nanorod is gradually shortened, and the diameter of the gold nanorod is maintained unchanged.

Description

Technical field [0001] The application of the present invention relates to a gold nanorod with high yield and large aspect ratio and a preparation method thereof, and belongs to the technical field of nanomaterial preparation. Background technique [0002] Gold nanorods are rod-shaped gold nanoparticles with a scale ranging from a few nanometers to hundreds of nanometers. In recent years, due to their unique surface plasmon properties, they have received extensive attention from researchers. They are used in biological sensing, optical storage, catalysis, and nanoelectronics. And clinical treatment and other fields show huge application prospects. [0003] A variety of methods for preparing gold nanorods have been developed, including electrochemical reduction, photochemical synthesis, and seed growth methods. Among these methods, the seed growth method proposed and improved by the groups led by American scientists Murphy and EI~Sayed respectively is the most mature, and can obtai...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00
Inventor 肖蔓达邵磊王建方
Owner NANOSEEDZ
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