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Gold nano-rod and up-conversion nano-crystal composite nano-material as well as preparation method thereof

A technology of nanocrystalline composite and gold nanorods, which is applied in nanotechnology, nanotechnology, nano-optics, etc., can solve the problems of insufficient mechanism analysis and theoretical explanation, and achieve the effect of improving luminous intensity

Inactive Publication Date: 2017-12-01
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the relevant mechanism analysis and theoretical explanation are not perfect enough.

Method used

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  • Gold nano-rod and up-conversion nano-crystal composite nano-material as well as preparation method thereof
  • Gold nano-rod and up-conversion nano-crystal composite nano-material as well as preparation method thereof
  • Gold nano-rod and up-conversion nano-crystal composite nano-material as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1) Preparation of gold nanorods:

[0056] First prepare the gold seed solution, add 5mL 0.5mM HAuCl in the glass bottle 4 solution and 5mL 0.2M CTAB (cetyltrimethylammonium bromide) solution, and stirred at a uniform speed. Then take 1mL and freshly prepare 0.01M NaBH with ice water 4 solution, added to CTAB-Au 3+ into the mixed solution and stirred rapidly for 2 minutes. The prepared gold seed solution can be used after growing for 2 hours at room temperature and protected from light.

[0057] Growth medium preparation method: Add 40mL 0.1M CTAB solution, 400μL 0.01MAgNO to a 50mL plastic centrifuge tube 3 solution, 2 mL 0.01M HAuCl 4 Solution, 800μL 1.0M HCl solution, after mixing evenly, the solution turns orange. Then, 320 μL of 0.1 M ascorbic acid (AA) solution was added to the mixed solution, and a colorless transparent solution was obtained after gently shaking to obtain a gold nanorod growth solution.

[0058] Preparation of gold nanorods: Add 15 µL of go...

Embodiment 2

[0068] The difference is that the volume of the ethanol solution of TEOS added in step (3) is 30 μL, and the reaction is carried out for at least 2 hours under shaking conditions, and the Au NR / SiO with a silicon dioxide thickness of about 13 nanometers is prepared. 2 Composite nanomaterial sample; step (4) high temperature treatment at 600° C. for 5 hours, other steps are the same as in Example 1.

Embodiment 3

[0070] The difference is that the volume of the ethanol solution of TEOS added in step (3) is 40 μL, and the reaction is carried out for at least 2 hours under shaking conditions, and Au NR / SiO with a silicon dioxide thickness of about 20 nanometers is prepared. 2 Composite nanomaterial sample; step (4) high temperature treatment at 600° C. for 4 hours, other steps are the same as in Example 1.

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Abstract

The invention discloses a gold nano-rod and up-conversion nano-crystal composite nano-material as well as a preparation method thereof. The composite nano-material is characterized in that a gold nano-rod is a core layer, silicon dioxide is an isolating layer and an up-conversion nano-crystal is a shell layer; the gold nano-rod is prepared by firstly using a seed method, cetyltrimethyl ammonium bromide (CTAB) on a surface of the gold nano-rod is replaced with methoxy polyethylene glycol (mPEG) to obtain the gold nano-rod of which the surface is coupled with mPEG; under a slightly alkaline condition, tetraethylorthosilicate (TEOS) is hydrolyzed to obtain a gold nano-rod composite structure covered with silicon dioxide, an up-conversion nano-crystal shell layer doped with rare earth is obtained through a urea hydrolysis method, and finally, an AuNR / SiO2 / Y2O3:Yb,Er composite nano-structure is formed. A sample prepared by the invention has multiple functions of photothermal conversion and fluorescence labeling, the problem that the up-conversion nano-crystal doped with the rare earth is difficultly grown on the surface of the gold-nano rod covered with the silicon dioxide in the prior art is solved, and the sample is potentially applied to the fields of early diagnosis and treatment on serious illness such as cancers.

Description

technical field [0001] The invention relates to the technical field of gold nanorod composite materials, in particular to a composite nanomaterial of gold nanorods and up-conversion nanocrystals and a preparation method thereof. Background technique [0002] In recent years, the use of the interaction between noble metal nanoparticles and upconversion nanocrystals or other phosphors to construct multifunctional nanocomposites is in the ascendant. So far, there have been reports on the preparation of Ag / SiO2 with Ag nanoparticles as the core. 2 / Y 2 o 3 : Er nanocomposites (Fan Zhang, et al. J. Am. Chem. Soc., 2010, 132, 2850) and the research results of upconversion luminescent nanomaterials modified with Au nanocrystals as shells (Li Peng Qian, et al. J. Nanopart. Res., 2011, 13, 499; Amiya Priyam, et al. J. Mater. Chem., 2012, 22, 960). The Kong Xianggui group of the Chinese Academy of Sciences reported a nanoparticle composited with upconversion nanoparticles and gold...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/06C09K11/78B82Y20/00B82Y30/00B82Y40/00A61K41/00A61K49/00A61P35/00
CPCA61K41/0052A61K49/0021A61K49/0093B82Y20/00B82Y30/00B82Y40/00C09K11/025C09K11/06C09K11/7769
Inventor 赵军伟王玉江贾铁昆陈建李继利
Owner LUOYANG INST OF SCI & TECH
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