SiO_2包覆壳层对Y_2O_3:Yb^(3+),Ho^(3+)纳米粒子上转换发光性能的影响  

EFFECT OF SiO_2 SHELLS ON UPCONVERSION LUMINESCENCE IN Y_2O_3: Yb^(3+)/Ho^(3+) NANOPARTICLES

作　　者：吕强[1] 祖国美[1] 吴英俊[1] 曹勇[1] 

机构地区：[1]黑龙江省肿瘤疾病防治重点实验室牡丹江医学院,黑龙江牡丹江157011

出　　处：《牡丹江医学院学报》2013年第2期1-4,共4页Journal of Mudanjiang Medical University

基　　金：黑龙江省教育厅科学计划项目(批准号:11551521);牡丹江医学院科研项目(201204)

摘　　要：目的:探索提高纳米粒子上转换发光的方法。方法:采用Stber方法,将SiO2壳层包覆在Y2O3:Yb3+,Ho3+纳米粒子表面;采用TEM、XRD和荧光光谱等方法研究表面包覆前后其上转换发光性能。结果:纳米粒子表面包覆SiO2壳层会改善Y2O3:Yb3+,Ho3+纳米粒子的上转换发光强度。结论:结论:SiO2包覆的Y2O3:Yb3+,Ho3+纳米粒子可作为生物荧光标记物应用于医学诊断。Objective： To explore the method of in creazing upconverzion luminescence of rare earth doped nanoparticles. Methods： Using St0ber method to make SiO2 shells be coated on the surfaces of Y2 03 ： Yb3 ＋ , H03 ＋ nanoparticles; and using TEM XRD and fluo- rescence spoctrephoto meter to investigate upconverzion luminescence properties of uncoated partidesi Resolts：Upconversion lumi- yb3 ＋ nescence intensifies ofY2O3：Yb3＋,H03＋oparticles may obviously be enhanced by coating SiO2 shells. Conclusion： It is therefore concluded that SiO2 coated Y203： Yb3＋ ,Ho3＋ nanopax-ticles have great potential to be used as fluorescence biolabels in the future.

关 键 词：上转换 纳米粒子 表面包覆 

分 类 号：R73[医药卫生—肿瘤]