Browsing by Author "Gazicki-Lipman M."
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- ItemFluorine doped titanium dioxide fi lms manufactured with the help of plasma enhanced chemical vapor deposition technique(2018) Sobczyk-Guzenda Anna; Owczarek S.; Wojciechowska Anna; Batory Damian; Fijalkowski Mateusz; Gazicki-Lipman M.In this work, a manufacture of TiO2 coatings doped with fluorine, in a concentration range of 0.6 to 6.7 at.%, is presented. The coatings were deposited onto silicon and quartz substrates with the help of radio frequency plasma enhanced chemical vapor deposition technique. They were characterized with regard to their elemental composition, chemical structure, phase composition, surface topography, optical properties, photo-wettability and bactericidal properties. For that purpose, such analytical techniques as X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, grazing incidence X-ray diffraction (GIXRD), scanning electron microscopy, atomic force microscopy, ultraviolet–visible absorption spectroscopy and variable angle spectroscopic ellipsometry were used. GIXRD analysis of the coatings doped with fluorine shows their amorphous structure. Apart from TiO2 bonding, FTIR and XPS analyses of the films reveal a presence of TiF and OF bonds. Surface morphology studies indicate an increasing number of surface defects along with growing fluorine content. The coatings exhibit promising optical properties with some of them showing a super-hydrophilic effect as well. On the other hand, the bactericidal effect of fluorine doped TiO2 coatings is weaker than that of plain TiO2.
- ItemMorphology, structure and photowettability of TiO2 coatings doped with copper and fluorine(Elsevier BV, 2018) Sobczyk-Guzenda Anna; Owczarek S.; Fijalkowski Mateusz; Batory Damian; Gazicki-Lipman M.The work reports synthesis, structure and properties of doubly doped titanium dioxide coatings activated by ultraviolet and visible light. Copper within a concentration range of 0.4–3.4 at% and fluorine within a concentration range of 1.7–9.4 at% were introduced as dopants. The coatings were prepared with the help of radiofrequency plasma enhanced chemical vapor deposition technique with a single precursor compound providing both dopants and titanium (IV) chloride being a source of titanium. Elemental composition and chemical bonding analyses of the coatings were carried out with the help of X-ray photoelectron spectroscopy. The results indicate that both admixtures are chemically bound to the TiO2 matrix – a notion confirmed by Fourier transform infrared spectroscopy. Phase composition studies, performed with a low angle X-ray diffraction method, revealed a presence of a threshold concentration of the dopants affecting the coatings crystallinity. Surface morphology and its topography were studied with the help of scanning electron microscopy and atomic force microscopy. Several coatings exhibited a superhydrophilic effect upon relatively short time of illumination.