Fig. 16From: The application of titanium dioxide, zinc oxide, fullerene, and graphene nanoparticles in photodynamic therapy[Taken from references (Alvarez et al. 2006, 2009)] a Chemical structure of free base P–C60 dyad. b Inactivation of Hep-2 cells irradiated with visible light (0–54 J/cm2) in atmosphere of air or argon (1 μM of P–C60, incubation time 24 h)Back to article page