Deposition of titanium nitride (TiN) on Co-Cr and their potential application as vascular stent

Vuong Hung Pham, Shin Hee Jun, Hyoun Ee Kim, Young-Hag Koh

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This study reports the effect of a TiN film on the mechanical properties and endothelial compatibility of a Co-Cr substrate. A dense, columnar TiN film with a preferential orientation of the (1 1 1) plane was deposited successfully on a Co-Cr substrate by reactive DC sputtering, particularly by applying a negative substrate bias during deposition. Good adhesion between the TiN film and Co-Cr substrate was achieved using a thin Ti film as an intermediate layer. The TiN film improved the mechanical properties of the Co-Cr significantly, such as the surface hardness and elastic modulus. In addition, the attachment and proliferation of endothelial cells were enhanced remarkably, which was attributed mainly to the favorable absorption of proteins on a biocompatible TiN surface.

Original languageEnglish
Pages (from-to)2864-2868
Number of pages5
JournalApplied Surface Science
Volume258
Issue number7
DOIs
Publication statusPublished - 2012 Jan 15

Keywords

  • Biocompatibility
  • Biomaterials
  • Deposition
  • Endothelial cell
  • Metals and alloys
  • Sputtering

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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