Graphene quantum dots as optical probes for cyanotoxins detection - Marcellino, Gabriela Medeiros; Ferreira, Ingred Lopes; Santos, Fabrício Aparecido dos; Lang, R. C.; Otubo, Larissa; Gonçalves, Maraísa; Zucolotto, Valtencir; Vieira, Nirton Cristi Silva (Brazilian MRS Meeting, 2019)