Preparation and Biofunctionalization of NaYF4:Yb3+Er3+ Upconversion Luminescent Nanoparticles

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Preparation and Biofunctionalization of NaYF4:Yb3+Er3+ Upconversion Luminescent Nanoparticles
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Upconversion nanophosphors were prepared by a solvothermal method.Then the surface of the upconversion nanophosphors was capped with silica by a modified Stber method.It was further treated with silane coupling agent to modify amino groups onto the surface of the nanophosphors.Finally,avidin was coupled onto the surface of the nanophosphors using glutaraldehyde as cross-linker.So,a avidin-functionalized upconversion nanophosphors was successfully prepared.The nanophosphors together with its functionalized process were characterized by transmission electron microscopy(TEM),X-ray diffraction(XRD),fourier transform infrared(FT-IR) spectroscopy,respectively.The results suggested that the functionalized nanophosphors have successfully conjugated with avidin and still keep its upconversion luminescence property.

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LI Shuang, WANG Zhou-ping. Preparation and Biofunctionalization of NaYF4:Yb3+Er3+ Upconversion Luminescent Nanoparticles[J]. Journal of Food Science and Biotechnology,2011,30(4):506-510.

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Online: June 17,2014
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