NDLI: Structural and antibacterial activity of hydroxyapatite and fluorohydroxyapatite co-substituted with zirconium

Content Provider	Springer Nature Link
Author	Sanyal, Vijayalakshmi Raja, C. Ramachandra
Copyright Year	2016
Abstract	The effect of zirconium (Zr) and cerium (Ce) ions co-substituted in hydroxyapatite (HA) and fluorohydroxyapatite (FHA), by sol–gel method, is reported in this technical article. Addition of Zr4+ and Ce3+ ions into HA and FHA reportedly transforms t-ZrO2 (tetragonal) to m-ZrO2 (monoclinic) phases resulting in HA/CSZ (Ce-stabilized zirconia) composites which improves the toughness of the materials widely used in biomedical applications. Samples with compositions 5Zr/5Ce-HA, 5Zr/5Ce-FHA, 40Zr/XCe-FHA (where X = 5, 10 and 20 mol% of Ce ions) were prepared and calcined at 800 °C. Incorporation of Ce ion stabilizes the zirconia, and fluorine ion improves thermal stability. Crystallite size, crystallinity and presence of m-ZrO2 and t-ZrO2 phases were analysed by XRD. The FTIR spectrum confirmed the presence of Zr–O stretching band. SEM reveals agglomerated spherical particles of 50–300 nm size, and ionic doping on HA was analysed through EDAX. The TG/DSC curves confirmed the formation of m-ZrO2 and t-ZrO2 phases and thermal stability of the samples. Higher concentrations of Zr and Ce ions in FHA resulted in reduction in crystallite size. The antibacterial activities of the samples were evaluated against the micro-organisms, Staphylococcus aureus and Escherichia coli exhibiting a inhibition zone diameter as 42 and 37 mm, respectively, for 40Zr/20Ce-FHA.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	122
Issue Number	2
e-ISSN	14320630
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-02-08
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Condensed Matter Physics Optical and Electronic Materials Nanotechnology Characterization and Evaluation of Materials Surfaces and Interfaces, Thin Films Operating Procedures, Materials Treatment
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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