Incorporation of Er:YAG nanoparticles in silica from a mixed Pechini/sol-gel method: synthesis and characterization - Mendes, Alessandra Carla; Siu Li, Máximo; Hernandes, Antônio Carlos; Carvalho, Jesiel Freitas; Maia, Lauro June Queiroz (Encontro Nacional de Física da Matéria Condensada - ENFMC, 2009)