Development of a New Treatment to Induce Anatase Growth on Ti
M. Pedeferri, C.E. Bottani, D. Cattaneo, A. Li Bassi, B. Del Curto, M.F. Brunella
Politecnico di Milano, IT
titanium, anatase, treatment, Raman Spectroscopy, XRD
Aim of the work has been the evaluation of the application of a novel treatment of the Ti surface in order to increase anatase growth. Two different anodizing methodologies, previously developed were considered, followed by a suitable post treatment able to convert the amorphous oxide film, obtained by anodizing, in a crystalline anatase structure. X ray thin film diffractometry and Raman spectroscopy were used to characterize six sample conditions: NA-NT Ti as received, NA-YT not anodized and heat treated, 1A-NT type 1 anodizing not heat treated, 1A-YT type 1 anodizing and heat treated, 2A-NT type 2 anodizing not heat treated, 2A-YT type 2 anodizing and heat treated. The better anatase crystallinity seems to be reached for the 1A-YT condition as shown by the higher intensity of the narrow anatase XRD peak and by Raman spectrum. In fact Raman spectrum of 2A-YT sample shows four anatase peaks but the most intense one is shifted towards higher frequencies and broadened, suggesting a crystallite dimension of tenth nanometers. Raman spectroscopy could give complementary informations to X ray diffraction analysis but the two analysis technique equally indicate that the treatment 1A followed by heat treatment could be applied to improve anatase growth on Ti surface.
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Nanotech 2005 Conference Program Abstract