Effect of titanium incorporation on the structural, mechanical and biocompatible properties of DLC thin films prepared by reactive-biased target ion beam deposition method

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • P. Vijai Bharathy
  • D. Nataraj
  • Huaiyu Wang
  • Q. Yang
  • M. S R N Kiran
  • J. Silvestre-Albero
  • D. Mangalaraj

Detail(s)

Original languageEnglish
Pages (from-to)143-150
Journal / PublicationApplied Surface Science
Volume257
Issue number1
Publication statusPublished - 15 Oct 2010

Abstract

Amorphous diamond like carbon (DLC) and titanium incorporated diamond like carbon (Ti-DLC) thin films were deposited by using reactive-biased target ion beam deposition method. The effects of Ti incorporation and target bias voltage on the microstructure and mechanical properties of the as-deposited films were investigated by means of X-ray photoelectron spectroscopy, Raman spectroscopy, transmission electron microscopy and nano-indentation. It was found that the Ti content in Ti-DLC films gets increased with increasing target bias voltage. At about 4.2 at.% of Ti, uniform sized well dispersed nanocrystals were seen in the DLC matrix. Using FFT analysis, a facility available in the TEM, it was found that the nanocrystals are in cubic TiC phase. Though at the core, the incorporated Ti atoms react with carbon to form cubic TiC; most of the surface exposed Ti atoms were found to react with the atmospheric oxygen to form weakly bonded Ti-O. The presence of TiC nanocrystals greatly modified the sp 3/sp2 hybridized bonding ratio and is reflected in mechanical hardness of Ti-DLC films. These films were then tested for their biocompatibility by an in vitro cell culturing test. Morphological observation and the cell proliferation test have demonstrated that the human osteoblast cells well attach and proliferate on the surface of Ti incorporated DLC films, suggesting possible applications in bone related implant coatings. © 2010 Elsevier B.V. All rights reserved.

Research Area(s)

  • Amorphous diamond like carbon thin film, Biocompatibility, Mechanical properties, Reactive-biased target ion beam deposition, Titanium

Citation Format(s)

Effect of titanium incorporation on the structural, mechanical and biocompatible properties of DLC thin films prepared by reactive-biased target ion beam deposition method. / Bharathy, P. Vijai; Nataraj, D.; Chu, Paul K.; Wang, Huaiyu; Yang, Q.; Kiran, M. S R N; Silvestre-Albero, J.; Mangalaraj, D.

In: Applied Surface Science, Vol. 257, No. 1, 15.10.2010, p. 143-150.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal