A. Carlos Yanes, Alejandro Santana-Alonso, Jorge Méndez-Ramos, Javier del-Castillo and Vicente D. Rodríguez Novel Sol–Gel Nano-Glass–Ceramics Comprising Ln3+-Doped YF3 Nanocrystals: Structure and High Efficient UV Up-Conversion Advanced Functional Materials 21
Transparent glass–ceramics containing Ln-doped YF3 nanocrystals are obtained under adequate thermal treatment of precursor sol–gel glasses: The image is an HRTEM bright-field micrograph of 90SiO2–10YF3 RE-doped nano-glass-ceramics heat-treated at 675 °C, showing the presence of YF3 nanoparticles. The right-top side inset corresponds to the power spectrum obtained from the region squared in white. The right-bottom inset corresponds to a magnified detail of the same zoomed region, showing the crystalline pattern of a YF3 nanoparticle.
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