Relaxation processes in rare-earth-doped α-NaYF4 nanoparticles by nuclear magnetic resonance spectroscopy - Flores, Alí Francisco García; Cagigas, Julián Andrés Munévar; Oliveira Junior, Marcos de; Rettori, Carlos; Urbano, Ricardo Rodrigues; Queiroz, Thiago Branquinho de (Journal of Physical Chemistry C, 2023)