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http://dx.doi.org/10.5012/bkcs.2008.29.5.1038

Doped Sol-gel TiO2 Films for Biological Applications  

Gartner, M. (Institute of Physical Chemistry, “Ilie Murgulescu”, Romanian Academy)
Trapalis, C. (Institute of Materials Science, National Center for Scientific Research)
Todorova, N. (Institute of Materials Science, National Center for Scientific Research)
Giannakopoulou, T. (Institute of Materials Science, National Center for Scientific Research)
Dobrescu, G. (Institute of Physical Chemistry, “Ilie Murgulescu”, Romanian Academy)
Anastasescu, M. (Institute of Physical Chemistry, “Ilie Murgulescu”, Romanian Academy)
Osiceanu, P. (Institute of Physical Chemistry, “Ilie Murgulescu”, Romanian Academy)
Ghita, A. (Institute of Physical Chemistry, “Ilie Murgulescu”, Romanian Academy)
Enache, M. (Institute of Biology, Center of Microbiology)
Dumitru, L. (Institute of Biology, Center of Microbiology)
Stoica, T. (National Institute of Materials Physics)
Zaharescu, M. (Institute of Physical Chemistry, “Ilie Murgulescu”, Romanian Academy)
Bae, J.Y. (Department of Chemistry and Chemical Engineering, Keimyung University)
Suh, S.H. (Department of Chemistry and Chemical Engineering, Keimyung University)
Publication Information
Bulletin of the Korean Chemical Society / v.29, no.5, 2008 , pp. 1038-1042 More about this Journal
Abstract
Mono and multilayer TiO2(Fe, $PEG_{600}$) films were deposited by the dip-coating on $SiO_2$/glass substrate using sol-gel method. In an attempt to improve the antibacterial properties of doped $TiO_2$ films, the influence of the iron oxides and polyethilenglycol ($PEG_{600}$) on the morphological, optical, surface chemical composition and biological properties of nanostructured layers was studied. Complementary measurements were performed including Spectroscopic Ellipsometry (SE), Scanning Electron Microscopy (SEM) coupled with the fractal analysis, X-Ray Photoelectron Spectroscopy (XPS) and antibacterial tests. It was found that different concentrations of Fe and $PEG_{600}$ added to coating solution strongly influence the porosity and morphology at nanometric scale related to fractal behaviour and the elemental and chemical states of the surfaces as well. The thermal treatment under oxidative atmosphere leads to films densification and oxides phase stabilization. The antibacterial activity of coatings against Escherichia Coli bacteria was examined by specific antibacterial tests.
Keywords
Sol-gel; Doped TiO2 thin films; SE; XPS; Antibacterial tests
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