Effects of molecular aggregation on photostability of protoporphyrin-IX/ halloysite nanotube composites - Tozoni, José Roberto; Marletta, Alexandre; Silva, Raigna A.; Piovesan, Erick; Oliveira, Kaluana P.; Dantas, Noelio O.; Silva, Anielle C. A.; Bonagamba, Tito José; Campana, Patricia Targon; Fernandes, Francisco M. Braz; Raposo, Maria (Materials Chemistry and Physics, 2020)