Gold nanorod vertical array and preparing method thereof

A technology of gold nanorods and arrays, which is applied in the field of vertical arrays of gold nanorods and its preparation, can solve the problems of small-scale gold nanorod arrays, discontinuous structure distribution, and inability to locate, and achieve wide application value and high structural uniformity , easy-to-operate effects

Active Publication Date: 2014-01-15
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, the gold nanorod array obtained by this method is small in scale (less than tens of microns), and the structure is scattered on the substrate discontinuously, which cannot be positioned, and the overall state is disordered.

Method used

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  • Gold nanorod vertical array and preparing method thereof
  • Gold nanorod vertical array and preparing method thereof
  • Gold nanorod vertical array and preparing method thereof

Examples

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preparation example Construction

[0017] The preparation method of the vertical array of gold nanorods according to the present invention comprises:

[0018] 1) Prepare an aqueous solution of trimethylcetylammonium bromide-modified gold nanorods, and redissolve them by centrifugation so that the concentration of trimethylcetylammonium bromide in the aqueous solution is 5-20umol / L, and the concentration of gold nanorods is 0.5-2nmol / L;

[0019] 2) contacting the mixture of monoalcohol with 1-3 carbon atoms and alkyl mercaptan with 9-12 carbon atoms with the aqueous solution obtained in step 1);

[0020] 3) After mixing chloroform and / or dichloroethane with the mixture obtained in step 2), and standing still, a vertical array of gold nanorods is obtained.

[0021] According to the present invention, the method for preparing the aqueous solution of gold nanorods modified by trimethylhexadecylammonium bromide can be carried out by using conventional methods in the art. For example, it can be prepared by seed gr...

Embodiment 1

[0045] 1) Take 1 mL of the aqueous solution of gold nanorods modified by trimethylhexadecylammonium bromide (the concentration of trimethylcetylammonium bromide is 0.1mol / L, and the concentration of gold nanorods is 1nmol / L) , after centrifuging at a speed of 12000rpm / min in a desktop high-speed centrifuge for 4 minutes, separate the precipitate, then fully dissolve the precipitate with 1mL of water, and then centrifuge under the same conditions, dissolve the precipitate with 1mL of water to obtain trimethyl The concentration of cetyl ammonium bromide is 10umol / L, and the concentration of gold nanorods is 1nmol / L in aqueous solution.

[0046] 2) Add 1mL of the aqueous solution obtained in step 1) into a 10mL glass bottle at a temperature of 25°C and a stirring speed of 700rpm / min, and drop in the mixture of ethanol and undecylmercaptan (The volume ratio of ethanol and undecyl mercaptan is 50:15) 65uL, continue to stir for 3min; then at the same temperature, change the stirring...

Embodiment 2

[0051] 1) Take 2 mL of an aqueous solution of gold nanorods modified by trimethylhexadecylammonium bromide (the concentration of trimethylcetylammonium bromide is 0.1mol / L, and the concentration of gold nanorods is 1.2nmol / L ), centrifuged at a speed of 12000rpm / min in a desktop high-speed centrifuge for 4 minutes, separated the precipitate, then fully dissolved the precipitate with 2mL of water, and then centrifuged under the same conditions, dissolved the precipitate with 2mL of water to obtain three The concentration of methyl cetyl ammonium bromide is 13umol / L, and the concentration of gold nanorods is 1.5nmol / L in aqueous solution.

[0052] 2) At a temperature of 25°C and a stirring speed of 900rpm / min, add 2mL of the aqueous solution obtained in step 1) into a 10mL glass bottle, and mix the mixture of ethanol and dodecylmercaptan (ethanol The volume ratio to dodecyl mercaptan is 80:20) 200uL is added twice, the same amount is added each time, and stirred for 2 minutes af...

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Abstract

The invention discloses a preparing method of a gold nanorod vertical array and the gold nanorod vertical array obtained through the preparing method. The preparing method comprises the steps that first, a water solution of a gold nanorod decorated by trimethyl cetyl ammonium bromide is prepared, centrifugal redissolving treatment is conducted, the concentration of the trimethyl cetyl ammonium bromide in the water solution is made to be 5-20 umol / L, and the concentration of the gold nanorod is 0.5-2nmol / L; second, the mixed liquid of monohydric alcohol with the carbon number being 1-3 and alkyl hydrosulfide with the carbon number being 9-12 is in contact with the water solution obtained in the first step; third, chloroform and / or dichloroethane are / is mixed with the mixed liquid obtained in the second step, the mixed liquid is stood, and the gold nanorod vertical array is obtained. According to the preparing method of the gold nanorod vertical array, the millimeter-graded super-large scale gold nanorod vertical array with the ordered array structure can be obtained, and the advantages that operating is easy, conditions are moderate, the structural uniform is high and the like are achieved.

Description

technical field [0001] The invention relates to a vertical array of gold nanorods and a preparation method thereof. Background technique [0002] Gold nanorod arrays have shape-dependent optical properties and collective properties brought about by plasmon resonance coupling between them. The periodic regular arrays have a wide range of applications in high-sensitivity sensors, solar cells, information storage, optoelectronic devices and other fields. [0003] In the prior art, the method for preparing the gold nanorod array is mainly by adding the gold nanorod solution dropwise on the substrate, and after the solvent evaporates completely, the remaining gold nanorods form the gold nanorod array on the substrate. However, the gold nanorod arrays obtained by this method are small in scale (less than tens of microns), and the structures are discontinuously scattered on the substrate, unable to be positioned, and generally appear in a disordered state. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C30B7/00C30B29/02C30B29/62
Inventor 葛广路魏文博
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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