Nano particles compounded of up-conversion nano particles and gold nanorods and preparation method and application of nano particles

A technology of nanoparticles and gold nanorods, which is applied in the field of nanobiomedicine to achieve the effect of small side effects, broad treatment prospects and remarkable curative effect

Inactive Publication Date: 2014-06-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to solve the existing defect of using multiple excitation wavelengths in photodynamic and phototh

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  • Nano particles compounded of up-conversion nano particles and gold nanorods and preparation method and application of nano particles
  • Nano particles compounded of up-conversion nano particles and gold nanorods and preparation method and application of nano particles

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preparation example Construction

[0022] The present invention firstly provides a preparation method of nanoparticles composited with upconversion nanoparticles and gold nanorods, comprising:

[0023] Reaction of upconverting core-shell nanoparticles with photosensitizer, and then with SiO 2 The coated gold nanorods are subjected to a coupling reaction to obtain composite nanoparticles of upconversion nanoparticles and gold nanorods; the SiO 2 The thickness of the coated gold nanorod shell is 30-60nm.

[0024] According to the present invention, the preparation method of the up-conversion core-shell nanoparticles is a commonly used method in the art, without special limitations, the specific preparation method can refer to the literature Monodisperse silica-coated polyvinylpyrrolidone / NaYF 4 nanocrystals with multicolor upconversion fluorescence emission, Angew.Chem.Int.Ed, 2006, 45, 7732-7735. and literature Synthesis of hexagonal-phase core-shell NaYF 4 Nanocrystals with tunable upconversion fluorescence, ...

Embodiment 1

[0035] 1. Prepare up-conversion NaYF by high-temperature pyrolysis 4 : Yb, Er nanoparticles (reference Monodisperse silica-coated polyvinylpyrrolidone / NaYF 4 nanocrystals with multicolor upconversion fluorescence emission, Angew. Chem. Int. Ed, 2006, 45, 7732-7735.). First, weigh the total amount of yttrium chloride YCl 3 ·6H 2 O236.8mg, ytterbium chloride YbCl 3 ·6H 2 O77.5mg, erbium chloride ErCl 3 ·6H 2 O76.3mg, weigh the quality, put it into a 50mL three-necked bottle, add 4mL oleic acid and 17mL1-octadecene. After stirring for half an hour to deoxygenate, heat up the temperature. After the medicines are dissolved, stop heating, cool to room temperature, and add 0.1gNaOH and 0.1482gNH 4 F in methanol solution, then heated up to 60°C and kept for 30min. Then keep at 75°C for 45min. The temperature was then raised to 300°C and held for 1.5 hours. After the reaction is finished, centrifuge with acetone and ethanol respectively, and the finally obtained up-conversion...

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Abstract

The invention provides nano particles compounded of up-conversion nano particles and gold nanorods and a preparation method and application of the nano particles, and belongs to the field of nano biomedicine. The method comprises the following steps: reacting up-conversion nuclear shell nano particles with a photosensitizer; and then, coupling with SiO2-coated gold nanorods to obtain the nano particles compounded of up-conversion nano particles and gold nanorods. The shell thickness of the SiO2-coated gold nanorods is 30-60nm. By means of the surface covalency or photosensitizer absorption of the up-conversion nano particles, the energy transfer efficiency is improved, so that the singlet oxygen yield is improved and the effect of photodynamics therapy is improved. Meanwhile, the acting distance betweeb the gold nanorods and the up-conversion nano particles is regulated to avoid the up-conversion fluorescence quenching phenomenon. According to the invention, upconversion and photodynamics therapy of the photosensitizer are combined with the photo-thermal effect of the SiO2-coated gold nanorods for preparing a synergic treatment nano platform. The purpose of two treatment ways are realized by one excitation light source is reached.

Description

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Claims

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Application Information

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Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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