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Sputter deposition of calcium phosphate/titanium dioxide hybrid thin films

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Boyd, A, Duffy, H, McCann, R and Meenan, BJ (2008) Sputter deposition of calcium phosphate/titanium dioxide hybrid thin films. MATERIALS SCIENCE AND ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 28 (2). pp. 228-236. [Journal article]

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DOI: 10.1016/j.msec.2006.12.004

Abstract

The application of either hydroxyapatite (HA) or titanium dioxide (TiO2) as coatings onto existing bioinert materials has been explored as the key route for enhancing the surface properties of hard tissue implant devices. However, it has been proposed that composite HA/TiO2 coatings may provide significant advantages for the application of such surfaces. This work reports on the surface properties Of Such composite HA/TiO2 surfaces produced by the sputter deposition of HA onto a titanium surface and their subsequent thermal processing using either post deposition (PDA) or in situ annealing (ISA). For both the PDA and ISA coatings, a hybrid nature was only achieved in the uppermost surface region after annealing at 700 degrees C. It was observed that the Ca/P ratio decreased with increasing annealing temperature for the PDA coatings and that the coating annealed to 700 degrees C had a value of 1.82 +/- 0.07, which was closest to stoichiometric HA. In comparison, the Ca/P ratio of the ISA samples increased with increasing annealing temperature. It has been shown that the resultant coatings have surface properties that are dependent on the annealing profiles employed, and that a temperature of 700 degrees C is required in order to create a Ca-P/TiO2 hybrid Surface. (c) 2006 Elsevier B.V. All rights reserved.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:5776
Deposited By:Dr Adrian Boyd
Deposited On:04 Jan 2010 09:43
Last Modified:07 Apr 2014 12:55

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