Abstract
In this work, a porous and homogeneous titanium dioxide layer was grown on commercially pure titanium substrate using a micro-arc oxidation (MAO) process and Ca–P-based electrolyte. The structure and morphology of the TiO2 coatings were characterized by X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy, and profilometry. The chemical properties were studied using electron dispersive X-ray spectroscopy (SEM–EDS) and X-ray photoelectron spectroscopy. The wettability of the coating was evaluated using contact angle measurements. During the MAO process, Ca and P ions were incorporated into the oxide layer. The TiO2 coating was composed of a mixture of crystalline and amorphous structures. The crystalline part of the sample consisted of a major anatase phase and a minor rutile phase. A cross-sectional image of the coating–substrate interface reveals the presence of voids elongated along the interface. An osteoblast culture was performed to verify the cytocompatibility of the anodized surface. The results of the cytotoxicity tests show satisfactory cell viability of the titanium dioxide films produced in this study.
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Acknowledgments
We are grateful to INMETRO for allowing this study to be conducted in its facilities, especially in Labit. We thank Dr. Erlon H. M. Ferreira for providing us with the Raman analysis; Leandro R. Lidízio for acquiring the MEV figures; and Carlos A. Senna for the FIB measurements. Lidia A. Sena thanks the CNPq for the fellowship (PROMETRO/CNPq 370823/2011-7).
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dos Santos, A., Araujo, J.R., Landi, S.M. et al. A study of the physical, chemical and biological properties of TiO2 coatings produced by micro-arc oxidation in a Ca–P-based electrolyte. J Mater Sci: Mater Med 25, 1769–1780 (2014). https://doi.org/10.1007/s10856-014-5207-3
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DOI: https://doi.org/10.1007/s10856-014-5207-3