Luminescence Studies and Judd-Ofelt Analysis on SiO₂@LaPO₄:Eu@SiO₂ Submicro-spheres with Different Size of Intermediate Shells.

ABSTRACT: The novel submicro-spheres SiO₂@LaPO₄:Eu@SiO₂ with core-shell-shell structures were prepared by connecting the SiO₂ submicro-spheres and the rare earth ions through an organosilane HOOCC₆H₄N(CONH(CH₂)₃Si(OCH₂CH₃)₃ (MABA-Si). The as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (IR). It is found that the intermediate shell of the submicro-spheres was composed by LaPO₄:Eu nanoparticles with the size of about 4, 5-7, or 15-34 nm. A possible formation mechanism for the SiO₂@LaPO₄:Eu@S

SUBMITTER: Zhu X 

PROVIDER: S-EPMC6737155 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature