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The deposition of strontium and zinc Co-substituted hydroxyapatite coatings

Robinson, L., Salma-Ancane, K., Stipniece, L., Meenan, Brian and Boyd, A. R. (2017) The deposition of strontium and zinc Co-substituted hydroxyapatite coatings. Journal of Materials Science: Materials in Medicine, 28 (3). pp. 1-14. [Journal article]

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URL: http://dx.doi.org/10.1007/s10856-017-5846-2

DOI: 10.1007/s10856-017-5846-2

Abstract

The in vitro and in vivo performance of hydroxyapatite (HAp) coatings can be modified by the addition of different trace ions, such as silicon (Si), lithium (Li), magnesium (Mg), zinc (Zn) or strontium (Sr) into the HAp lattice, to more closely mirror the complex chemistry of human bone. To date, most of the work in the literature has considered single ion-substituted materials and coatings,with limited reports on co-substituted calcium phosphate systems. The aim of this study was to investigate the potential of radio frequency magnetron sputtering to deposit Sr and Zn co-substituted HAp coatings using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy (XPS). The FTIR and XPS results highlight that all of the Sr, Zn and Sr-Zn co-substituted surfaces produced are all dehydroxylated and are calcium deficient. All of the coatings contained HPO4 2− groups, however; only the pure HAp coating andthe Sr substituted HAp coating contained additional CO3 2− groups. The XRD results highlight that none of the coatings produced in this study contain any other impurity CaP phases, showing peaks corresponding to that of ICDD file #01-072-1243 for HAp, albeit shifted to lower 2θ valuesdue to the incorporation of Sr into the HAp lattice for Ca (in the Sr and Sr-Zn co-substituted surfaces only). Therefore, the results here clearly show that RF magnetron sputtering offers a simple means to deliver Sr and Zn co-substituted HAp coatings with enhanced surface properties.

Item Type:Journal article
Keywords:RF magnetron sputtering, hydroxyapatite coating, co-deposition, co-substitution, strontium, zinc
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:36952
Deposited By: Dr Adrian Boyd
Deposited On:24 Feb 2017 08:49
Last Modified:14 Feb 2018 23:23

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