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17 November 2010 Fluorescence properties of RE-doped silica spheres
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The modified base-catalyzed method and the seed growth method were employed to synthesize Eu(TTFA)3-doped silica hybrid spheres. The transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR) and fluorescence spectrometer were used to characterize the doping particles. The results show that all kinds of as-prepared particles present the spherical morphology and the smooth surfaces. TEM images reveal that silica hybrid spheres are monodisperse and have an average diameter of sub-micron. FTIR analyses show that synthesized silica colloidal spheres mainly consist of 4-fold silaxone rings, including incomplete condensed silanols and incomplete hydrolyzed alkoxy groups. The hybrid spheres doped with Eu(TTFA)3 prepared by different methods exhibit the characteristic photoluminescence (PL) of the Eu3+ ions and excellent narrow-line emission characteristic of Eu3+ ions. The existence of silica matrix has obious effect on the absorption properties of the ligand and slight effect on the emission properties of Eu3+.
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C. Q. Huang, Q. Cai, and W. J. Tian "Fluorescence properties of RE-doped silica spheres", Proc. SPIE 7847, Optoelectronic Devices and Integration III, 78472V (17 November 2010);

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