Journal
COLLOIDS AND SURFACES B-BIOINTERFACES
Volume 84, Issue 2, Pages 400-405Publisher
ELSEVIER
DOI: 10.1016/j.colsurfb.2011.01.033
Keywords
Titanium; TiO2 nanotube layer; Corrosion; Serum proteins
Funding
- Shanghai Leading Academic Discipline Project [S30206]
- Science and Technology committee of Shanghai [08DZ2271100, 1052nm04300, 10JC1408600]
- Shanghai Leadind Academic Discipline Project [T0202]
- National Natural Science Foundation Of China [81070866]
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Titanium oxide nanotubes prepared by anodization have received considerable attention in the biomaterials domain. The objective of this study was to demonstrate the electrochemical behavior of different diameter TiO2 nanotube layers on titanium in phosphate buffered saline (PBS) and Dulbecco's minimum essential medium + 10% fetal calf serum (D-FCS) using open circuit potentials (OCP), electrical impedance spectroscopy (EIS), and a potentiodynamic polarization test. The results showed that the nanotubes had higher OCP, higher resistance of the inter barrier layer (R-b), and lower I-pass in the two test solutions compared to the smooth Ti, especially the 30 nm diameter nanotubes. The corrosion resistance of the nanotubes in D-FCS was higher than in PBS because of protein, adsorption from the D-FCS solution as suggested by scanning electron microscope (SEM) images. In addition, protein aggregates of 30 nm diameter nanotubes caused the model of EIS spectra to transform from two-layer to three-layer. The corrosion behavior of the nanotubes for use as a dental implant material is discussed. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
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