title: Thin films of SiO2 and hydroxyapatite on titanium deposited by spray pyrolysis.
abstract: Wet spray pyrolysis of fine, well-dispersed a SiO2 sol was used for the deposition of thin films of silicon dioxide. The sol was obtained by hydrothermal precipitation of silicon acid from a solution at pH = 10. The morphology, roughness, phase composition, chemical homogeneity and the mechanism of the films were investigated by SEM, EDS and IR spectroscopy. The obtained results show a complete covering of the titanium substrate with SiO2 after 3 h of deposition. It was observed that the film thickness increased from 3 to 19 microm, the roughness of the film decreased from 12 to 3 microm, while the morphology of the deposit changed considerably. A hydroxyapatite film was prepared on the so-obtained SiO2 thin film by spray pyrolysis deposition and its morphology and phase composition were investigated.
authors.affiliation: Institute of Nuclear Sciences Vinca Laboratory for Radiation Chemistry and Physics, P.O. Box 522, Belgrade 11001, Republic of Serbia. vukomanj@ptt.yu
authors.forename: V
authors.initials: V
authors.lastname: Jokanovic
authors.forename: B
authors.initials: B
authors.lastname: Jokanovic
authors.forename: D
authors.initials: D
authors.lastname: Izvonar
authors.forename: B
authors.initials: B
authors.lastname: Dacic
mesh_terms: D002627:Chemistry, Physical / Q000379:methods; D020099:Coated Materials, Biocompatible; D017886:Durapatite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006882:Hydroxyapatites / Q000737:chemistry; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D012825:Silicon / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods; D013499:Surface Properties; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D020099:Coated Materials, Biocompatible; D006882:Hydroxyapatites; D012822:Silicon Dioxide; D017886:Durapatite; D014025:Titanium; D012825:Silicon