Antibacterial effect of silver modified TiO2/PECVD films

• Published in: The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2009-08, Vol.54 (2), p.189-193
• Main Authors: Hájková, P., Špatenka, P., Krumeich, J., Exnar, P., Kolouch, A., Matoušek, J., Kočí, P.
• Format: Article
• Language: English
• Subjects: Applications of Nonlinear Dynamics and Chaos Theory; Atomic; Molecular; Optical and Plasma Physics; Physical Chemistry; Physics; Physics and Astronomy; Quantum Information Technology; Quantum Physics; Spectroscopy/Spectrometry; Spintronics; Topical issue: 23rd Symposium on Plasma Physics and Technology
• ISSN: 1434-6060; 1434-6079
• DOI: 10.1140/epjd/e2009-00087-7

This paper deals with photocatalytic activity of silver treated TiO 2 films. The TiO 2 films were deposited on glass substrates by plasma enhanced chemical vapor deposition (PECVD) in a vacuum reactor with radio frequency (RF) low temperature plasma discharge in the mixture of oxygen and titanium isopropoxide vapors (TTIP). The depositions were performed under different deposition conditions. Subsequently, the surface of TiO 2 films was modified by deposition of silver nanoparticles. Photocatalytic activity of both silver modified and unmodified TiO 2 films was determined by decomposition of the model organic matter (acid orange 7). Selected TiO 2 samples were used for tests of antibacterial activity. These tests were performed on Gram-negative bacteria Escherichia coli. The results clearly proved that presence of silver clusters resulted in enhancement of the photocatalytic activity, which was up to four times higher than that for pure TiO 2 films.