Enhancement of bioactivity of titanium carbonitride nanocomposite thin films on steels with biosynthesized hydroxyapatite.
Thin films of titanium carbonitride (TiCN) were fabricated by DC magnetron sputtering on medical grade steel. The biocompatibility of the coating was further enhanced by growing hydroxyapatite crystals over the TiCN-coated substrates using biologically activated ammonia from synthetic urine. The coatings were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy (SEM)-energy dispersive spectroscopy, and Raman spectroscopy. The electrochemical behavior of the coatings was determined in simulated body fluid. In addition, hemocompatibility was assessed by monitoring the attachment of platelets on the coating using SEM. The wettability of the coatings was measured in order to correlate with biocompatibility results. Formation of a coating with granular morphology and the preferred orientation was confirmed by SEM and X-ray diffraction results. The hydroxyapatite coating led to a decrease in thrombogenicity, resulting in controlled blood clot formation, hence demonstrating the hemocompatibility of the coating.
Electrochemical Materials Science Division, Central Electrochemical Research Institute, Karaikudi, India.
V V Anusha
VV
Thampi
Corrosion and Materials Protection Division, Central Electrochemical Reserach Institute, Karaikudi, India.
P
P
Dhandapani
Centre for Bio-Materials Science and Technology, VIT University, Vellore, India.
Geetha
G
Manivasagam
Electrochemical Materials Science Division, Central Electrochemical Research Institute, Karaikudi, India.
B
B
Subramanian
D001777:Blood Coagulation; D001826:Body Fluids / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D013052:Spectrometry, X-Ray Emission; D013232:Steel / Q000737:chemistry*; D013927:Thrombosis; D014025:Titanium / Q000737:chemistry*; D017155:Wettability; D014961:X-Ray Diffraction
D020099:Coated Materials, Biocompatible; C096522:titanium carbonitride; D013232:Steel; D017886:Durapatite; D014025:Titanium
biocompatibility; magnetron sputtering; titanium carbonitride thin films; ureolytic bacteria