Study of the ferrofluid drying process for morphological and nanostructutal characterization - Gamara, L. F.; Brito, Giancarlo Espósito de Souza; Pontuschka, Walter Maigon; Mamani, Javier Bustamante; Moreira-Filho, Carlos Alberto; Amaro Junior, Edson (Brazilian Journal of Physics, 2007)