The antibacterial properties of Ag and Cu are well known. In addition, metallic nanostructures can be used to improve the performance of TiO2. Au and Ag nanoparticles are realized by sputtering deposition of metals and following thermal treatments or by ion implantation. The coating of TiO2 and the spatial separation of the metallic nanostructures are studied in order to improve the optical properties of TiO2, that can turn out into an enhanced photocatalytic activity of the material in water. Laser ablation technique is also investigated to prepare metallic and metallic oxides nanoparticles in liquids (water, solvents and polymers).
V. Scuderi, G. Impellizzeri, L. Romano, M. Scuderi, M. V. Brundo, K. Bergum, M. Zimbone, R. Sanz Gonzàlez, M. A. Buccheri, F. Simone, G. Nicotra, B. G. Svensson, M. G. Grimaldi and V. Privitera. "An enhanced photocatalytic response of nanometric TiO2 wrapping of Au nanoparticles for eco-friendly water applications", Nanoscale, Vol. 6, pp. 11189, 2014.
G. Cacciato, M. Bayle, A. Pugliara, C. Bonafos, M. Zimbone, V. Privitera, M.G. Grimaldi and R. Carles. "Enhancing carrier generation in TiO2 by a synergistic effect between plasmon resonance in Ag nanoparticles and optical interference", NANOSCALE , Vol. 7, pp 13468-13476, 2015.
A. Di Mauro, M. Zimbone, M. Scuderi, G. Nicotra, M. E. Fragalà , and G. Impellizzeri, “Effect of Pt Nanoparticles on the Photocatalytic Activity of ZnO Nanofibers”, Nanoscale Research Letters , Vol. 10:484, pp. 1-7, 2015.
R. Carles, M. Bayle, P. Benso, G. Benassayag, C. Bonafos, G. Cacciato, and V. Privitera, “Plasmon-resonant Raman spectroscopy in metallic nanoparticles: surface-enhanced scattering by electronic excitations”, Physical Review B, Vol. 92, pp.174302-1-13, 2015.
G. Cacciato, F. Ruffino, M. Zimbone, R. Reitano, V. Privitera, and M. G. Grimaldi, “Au thin films nano-structuration on polycrystalline anatase and rutile TiO2 substrates towards photocatalytic applications”, Materials Science in Semiconductor Processing , Vol. 42, pp. 40-44, 2016.