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Journal of Nanomaterials
Volume 2012 (2012), Article ID 708519, 9 pages
Research Article

Phototriggered Production of Reactive Oxygen Species by TIO2 Nanospheres and Rods

1DFG-Centre for Functional Nanostructures, Kalrsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße1a, 76131 Karlsruhe, Germany
2Laboratorium für Elektronmikriskopie, Karlsruhe Institute of Technology (KIT), Engessestrasse, 76131 Karlsruhe, Germany

Received 5 March 2012; Revised 20 September 2012; Accepted 25 September 2012

Academic Editor: Grégory Guisbiers

Copyright © 2012 Bianca Geiseler et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We present the study of reactive oxygen species production under the light irradiation of two different types of TiO2 nanocrystals. Both TiO2 spheric NPs and anisotropic nanorods were investigated using activation of the horseradish peroxidase enzyme and subsequent substrate oxidation into a fluorescent product. The influence of the surface ligand dopamine was also explored to shed more light on the effect of catechol binders on the photoactivity of TiO2 species.