Apatite formation from simulated body fluid on various phases of TiO2 thin films prepared by filtered cathodic vacuum arc deposition

Hydroxyl (OHa degree )-free TiO2 thin films with amorphous and crystalline phases were deposited onto (100) silicon substrates using filtered cathodic vacuum arc deposition in order to investigate the in vitro apatite formation in simulated body fluid (SBF). The surface morphology, composition and s...

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Bibliographic Details
Published in:Thin solid films 2010-12, Vol.519 (4), p.1300-1306
Main Authors: AMIN, M. S, RANDENIYA, L. K, BENDAVID, A, MARTIN, P. J, PRESTON, E. W
Format: Article
Language:English
Subjects:
Anatase
Apatite
Arc deposition
Carbonation
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Deposition
Exact sciences and technology
Materials science
Methods of deposition of films and coatings
film growth and epitaxy
Physics
Rutile
Structure and morphology
thickness
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Theory and models of film growth
Thin film structure and morphology
Thin films
Titanium dioxide
Vacuum deposition
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Summary:Hydroxyl (OHa degree )-free TiO2 thin films with amorphous and crystalline phases were deposited onto (100) silicon substrates using filtered cathodic vacuum arc deposition in order to investigate the in vitro apatite formation in simulated body fluid (SBF). The surface morphology, composition and structure of the TiO2 thin films were characterized. The X-ray photoelectron spectroscopy results confirmed the presence of calcium and phosphorus on all TiO2 thin film surfaces after immersion in SBF at 37A degree C. Fourier transform infra red results showed the presence of carbonated apatite on the surface of these films. Amorphous structured TiO2 thin film showed poor ability to form apatite on its surface in SBF. Apatite formation was more pronounced on the surfaces of the anatase films in comparison to those of rutile. The carbonated apatite deposition rate increased significantly when the TiO2 film was illuminated with UV light prior to immersing in the SBF. In particular, the UV-treated anatase and rutile films showed increased rates of carbonated apatite formation on their surfaces in comparison to samples not treated with radiation. The increase in hydrophilicity due to UV treatment appears beneficial for the apatite growth on these surfaces.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2010.09.029