Luminescence decay of Sm:LaF3@LaF3 core-shell crystalline nanoparticles Elena Lukinova, Eduard Madirov, Maxim Pudovkin, Darya Koryakovtseva, Stella Korableva, Alexey Nizamutdinov and Vadim Semashko EPJ Web Conf., 161 (2017) 03012 Published online: 31 October 2017 DOI: 10.1051/epjconf/201716103012