title: Synthesis and characterization of monodispersed SiO2@Y3Al5O12:Er3+ core-shell particles.
abstract: Submicron core-shell structure particles SiO2@Y3Al5O12:Er3+, which silica spherical particles was coated with an yttrium aluminum garnet (Y3Al5O12) layer doped with Er3+, were prepared by the modified Pechini-Type sol-gel method for the first time. The structure and morphology of samples were detected by the X-ray powder diffraction (XRD) measurement, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), respectively. The results indicate that well-crystallized garnet nanocrystallines were formed on the surface of the silica particles. The luminescent spectra in near infrared and visible region of the core-shell structured SiO2@Y3Al5O12:Er3+ powders were also investigated and compared with those of the pure Y3Al5O12:Er3+ and the Er3+ doped silicate glass. The results show that mono-dispersed SiO2@Y3Al5O12:Er3+ core-shell spherical particles with the near infrared, red and green luminescent emissions under the excitation of 980 nm laser diode have been successfully synthesized.
authors.affiliation: Key Lab of Specially Functional Materials of Ministry of Education and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, People's Republic of China.
authors.forename: Cheng-Ning
authors.initials: CN
authors.lastname: Xie
authors.forename: Zhong-Min
authors.initials: ZM
authors.lastname: Yang
authors.forename: Yan-Hui
authors.initials: YH
authors.lastname: Sun
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D004871:Erbium / Q000737:chemistry*; D008163:Luminescent Measurements; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010100:Oxygen / Q000737:chemistry*; D010316:Particle Size; D012822:Silicon Dioxide / Q000138:chemical synthesis* / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D014961:X-Ray Diffraction; D015019:Yttrium / Q000737:chemistry*
chemical_list: D015019:Yttrium; D012822:Silicon Dioxide; D004871:Erbium; D000535:Aluminum; D010100:Oxygen