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
CN107418554AInactive Publication Date: 2017-12-01LUOYANG INST OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LUOYANG INST OF SCI & TECH
Publication Date
2017-12-01
Estimated Expiration
Not applicable · inactive patent

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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.
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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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