Corrosion resistance and biocompatibility of titanium surface coated with amorphous tantalum pentoxide

Ying Sui Sun, Jean Heng Chang, Her Hsiung Huang

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Tantalum pentoxide (Ta2O5) possesses good corrosion resistance and biocompatibility. This study aimed to improve the corrosion resistance and biocompatibility of titanium (Ti) by coating it with an amorphous Ta2O5 surface layer. An amorphous Ta2O 5 layer was prepared on the Ti surface using a simple hydrolysis-condensation process at room temperature. The surface characteristics of the test specimens were analyzed using X-ray photoelectron spectroscopy, glancing angle X-ray diffraction, field emission scanning electron microscopy, and contact angle measurements. The corrosion resistance of the test specimens was evaluated from the potentiodynamic polarization curves and ion release measurements in simulated blood plasma (SBP). The biocompatibility of the test specimens was evaluated in terms of the protein (albumin) adsorption, cell adhesion, and cell growth of human bone marrow mesenchymal stem cells (hBMSCs). The amorphous Ta2O5 layer with a porous micro-/nano-scale topography, which was deposited on the Ti surface using a simple hydrolysis-condensation process, increased the corrosion resistance (i.e., increased the corrosion potential and decreased the anodic current and ion release) of the Ti in the SBP and improved the surface wettability, albumin adsorption, and cell adhesion. We conclude that the presence of an amorphous Ta2O5 layer on the Ti surface increased the corrosion resistance and biocompatibility of Ti.

Original languageEnglish
Pages (from-to)130-135
Number of pages6
JournalThin Solid Films
Volume528
DOIs
Publication statusPublished - Jan 15 2013

Keywords

  • Biocompatibility
  • Corrosion resistance
  • Tantalum pentoxide
  • Titanium

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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