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Enhancement of bioactivity of titanium carbonitride nanocomposite thin films on steels with biosynthesized hydroxyapatite

Authors Thampi VVA, Dhandapani P, Manivasagam G, Subramanian B

Received 5 January 2015

Accepted for publication 18 March 2015

Published 1 October 2015 Volume 2015:10(Supplement 1 Challenges in biomaterials research) Pages 107—118


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Prof. Dr. Thomas J. Webster

VV Anusha Thampi,1 P Dhandapani,2 Geetha Manivasagam, B Subramanian1

1Electrochemical Materials Science Division, Central Electrochemical Research Institute, Karaikudi, 2Corrosion and Materials Protection Division, Central Electrochemical Reserach Institute, Karaikudi, 3Centre for Bio-Materials Science and Technology, VIT University, Vellore, India

Abstract: 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.

Keywords: titanium carbonitride thin films, magnetron sputtering, ureolytic bacteria, biocompatibility

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