Reactive plasma-aided RF sputtering deposition of hydroxyapatite bio-implant coatings
Long, J., Sim, L., Xu, S., & Ostrikov, K. (2007) Reactive plasma-aided RF sputtering deposition of hydroxyapatite bio-implant coatings. Chemical Vapor Deposition, 13(6-7), pp. 299-306.
The plasma-assisted RF sputtering deposition of a biocompatible, functionally graded calcium phosphate bioceramic on a Ti6A14 V orthopedic alloy is reported. The chemical composition and presence of hydroxyapatite (HA), CaTiO3, and CaO mineral phases can be effectively controlled by the process parameters. At higher DC biases, the ratio [Ca]/[P] and the amount of CaO increase, whereas the HA content decreases. Optical emission spectroscopy suggests that CaO+ is the dominant species that responds to negative DC bias and controls calcium content. Biocompatibility tests in simulated body fluid confirm a positive biomimetic response evidenced by in-growth of an apatite layer after 24 h of immersion.
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|Item Type:||Journal Article|
|Keywords:||Calcium phosphate, Crystallization, Hydroxyapatite, Optical emission spectroscopy, RF sputtering deposition, Simulated body fluid|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Deposited On:||17 Jul 2014 00:02|
|Last Modified:||17 Jul 2014 23:37|
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