Sputter deposition of calcium phosphate/titanium dioxide hybrid thin films

A Boyd, H Duffy, R McCann, BJ Meenan

Research output: Contribution to journalArticle

41 Citations (Scopus)

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.
LanguageEnglish
Pages228-236
JournalMATERIALS SCIENCE AND ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
Volume28
Issue number2
DOIs
Publication statusPublished - Mar 2008

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Sputter deposition
calcium phosphates
Calcium phosphate
titanium oxides
Titanium dioxide
Durapatite
Hydroxyapatite
Annealing
Thin films
annealing
coatings
Coatings
thin films
Personal digital assistants
surface properties
Surface properties
composite materials
Composite materials
titanium dioxide
calcium phosphate

Cite this

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title = "Sputter deposition of calcium phosphate/titanium dioxide hybrid thin films",
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.",
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Sputter deposition of calcium phosphate/titanium dioxide hybrid thin films. / Boyd, A; Duffy, H; McCann, R; Meenan, BJ.

In: MATERIALS SCIENCE AND ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, Vol. 28, No. 2, 03.2008, p. 228-236.

Research output: Contribution to journalArticle

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AU - McCann, R

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AB - 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.

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