Bifunctional luminescent and magnetic core/shell type nanostructures Fe_3O_4@CeF_3:Tb^(3+)/SiO_2

查看全文 作　　者：[1]M.Runowski;[1]T.Grzyb;[1]S.Lis

机构地区：[1]Department of Rare Earths,Faculty of Chemistry,Adam Mickiewicz University

出　　处：《Journal of Rare Earths》索引2011年第29卷第12期,共6页

基　　金：Project supported by the Polish Ministry of Science and Higher Education (N N204 329736) 摘　　要：A facile co-precipitation and microemulsion methods were applied to obtain core/shell type nanoparticles.Cerium fluoride doped with terbium(III) ions supplied intensive green luminescence of the system.Due to the presence of magnetite nanoparticles as cores,the prod-uct was highly sensitive to external magnetic field.Both sorts of nanostructures were encapsulated by silica shell.Such external layer of inert oxide can potentially increase the resistance of prepared nanostructures to thermal oxidation,aggressive agents,changing of pH or destructive radiation.Morphology of the product was examined using transmission electron microscopy(TEM) .Formations of the core/shell type nanos-tructures were clearly seen in the TEM pictures.Powder X-ray diffraction(XRD) confirmed the structure of the products,their nanocrystallin-ity and amorphous nature of silica shell.Optical properties were investigated by measuring excitation and emission spectra.Such multifunctional luminescent and magnetic nanoparticles coated with easily functionalized silica shell could be applied in many field of science. 关键词：纳米FE3O4 核/壳型绿色发光二氧化硅 CeF3 双功能磁性纳米粒子透射电子显微镜

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Bifunctional luminescent and magnetic core/shell type nanostructures Fe_3O_4@CeF_3:Tb^(3+)/SiO_2

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