Song J, Zhi G, Zhang Y, Mei B. Synthesis and Characterization of CaF2 Nanoparticles with Different Doping Concentrations of Er3+. Nano-Micro Lett [Internet]. 2011Jun.23 [cited 2024Nov.17];3(2):73-8. Available from: https://mail.nmlett.org/index.php/nml/article/view/759