Comparative Photoactivity and Antibacterial Properties of C60 Fullerenes and Titanium Dioxide Nanoparticles
作者： Léna Brunet , Delina Y. Lyon , Ernest M. Hotze , Pedro J. J. Alvarez , Mark R. Wiesner
DOI: 10.1021/ES803093T
关键词:
摘要: The production of reactive oxygen species (ROS) by aqueous suspensions fullerenes and nano-TiO2 (Degussa P25) was measured both in ultrapure water minimal Davis (MD) microbial growth medium. Fullerol (hydroxylated C60) produced singlet (1O2) 1O2 superoxide (O2−•) MD medium, but no hydroxyl radicals (OH•) were detected either case. PVP/C60 (C60 encapsulated with poly(N-vinylpyrrolidone)) more efficient than fullerol generating superoxide. However, two other aggregates C60, namely THF/nC60 (prepared tetrahydofuran as transitional solvent) aqu/nC60 vigorous stirring C60 powder water), not photoactive. Nano-TiO2 (also present aggregates) primarily pure Bacterial (Escherichia coli) toxicity tests suggest that, unlike which exclusively phototoxic, the antibacterial activity fullerene linked to ROS...
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