Method for coating two ends of gold nanorod with silicon dioxide

A gold nanorod and silicon dioxide technology, which is applied in the synthesis field of metal nanomaterials, can solve the problem that the soft template method is easily affected by thermal and dynamic factors, and achieves the effect of not easy to dissociate, wide application prospect and good blocking effect.

Pending Publication Date: 2022-04-12
HANGZHOU DIANZI UNIV
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and repeatable method of coating silicon dioxide on both ends of gold nanorods, which solves the problem that the soft template method is easily affected by thermal and dynamic factors

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  • Method for coating two ends of gold nanorod with silicon dioxide
  • Method for coating two ends of gold nanorod with silicon dioxide
  • Method for coating two ends of gold nanorod with silicon dioxide

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Embodiment 1

[0023] (1) Repairing the gold nano-dispersion by seed growth method:

[0024] 0.025ml, 0.1m will haucl 4 Solution and 10 ml, 0.1 m CTAB solution mixed, stirred into seed solution; 0.6 ml, 0.01m NABH 4 Solution; 2.5 mL, 0.1 m CTAB solution was dissolved in 0.037 g of Naol at 50 ° C at 21.25 ml of water, and then 0.9 ml, 4 mm agno was added to 30 ° C. 3 Solution, 30 ° C water bath constant temperature, stand for 15 min, add 0.25 ml, 10 mm HAUCL 4 The solution, 400 rpm was stirred for 60 min to give a solution; the growth solution pH was adjusted to 1.1 with a hydrochloric acid having a mass concentration of 37%, sequentially added 75 μL, 64 mm ascorbic acid solution and 40 μl of seed solution, and heated at 30 ° C for 12 h.

[0025] (2) Cartrom in the obtained gold nano-nano dispersion, remove the supernatant, then obtain the gold nanoscale nano, and disperse the gold nano rod in a CTAB solution having a concentration of 0.15 mm, and the concentration of 0.1 mm gold nano CTAB Disper...

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Abstract

The invention discloses a method for coating two ends of a gold nanorod with silicon dioxide. The method comprises the following steps: (1) preparing a gold nanorod dispersion liquid by using a seed growth method; (2) centrifuging the obtained gold nanorod dispersion liquid, removing supernate, cleaning to obtain gold nanorods, and dispersing the gold nanorods in a CTAB (Cetyltrimethyl Ammonium Bromide) solution to obtain gold nanorod CTAB dispersion liquid; and (3) adjusting the pH value of the CTAB dispersion liquid of the gold nanorod to 8.5, adding an ethanol solution of TEOS at one time in a stirring state, stirring for 2 days, centrifuging, cleaning a separated substance with water and ethanol, and dispersing the separated substance in ethanol to obtain the gold nanorod with two ends coated with silicon dioxide. The synthesis method is simple and high in repeatability, and the obtained dumbbell-shaped silicon dioxide shell serves as a hard template and is not prone to being influenced by environmental factors.

Description

Technical field [0001] The present invention relates to the field of synthesis of metal nanomaterials, and more particularly to a method of coating silica at both ends of the gold nano rod. Background technique [0002] In recent years, noble metal nanoparticles have gradually become a key topic of researchers, in which gold nano rod has caused interest in sensors, catalysis, biomedicine, and other fields of sensors. However, compared to the nanostructure of a single component, the bimetal structure can not only change its morphology, but also optimize their physical chemical properties through the second metal, such as the surface of the gold nano rod. Silver can enhance its resonance performance, coated platinum or palladium can have better catalytic ability, so there is also a wide concern and research. What is more worthy is that the second metal provides more possibilities to their new physicochemical properties on the golden nano rods, providing a richer active site to furt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/16B22F1/054B22F1/07B22F9/24B82Y30/00B82Y40/00B01J23/52B01J35/00B01J35/02
Inventor 邓天松窦云奇张敏胡鑫李仕琦程知群
Owner HANGZHOU DIANZI UNIV
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