Quenching of photoactivity in phthalocyanine copper(II)-titanate nanotube hybrid systems - Alves, W; Ribeiro, A. O; Pinheiro, M. V. B; Krambrock, Klaus; Haber, F. El; Froyer, G; Chauvet, O; Ando, Rômulo Augusto; Souza, F. L; Alves, W. A (Journal of Physical Chemistry C, 2011)