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Study of the interaction of inorganic and organic compounds of cell culture medium with a Ti surface

Paper ID Volume ID Publish Year Pages File Format Full-Text
2080 99 2010 10 PDF Available
Title
Study of the interaction of inorganic and organic compounds of cell culture medium with a Ti surface
Abstract

The interaction between Ti and each component of Dulbecco’s modified Eagle’s medium was studied in depth using different techniques, such as the measurement of the corrosion potential, electrochemical impedance spectroscopy and polarization curves. The characterization of metal surfaces was carried out by scanning electron microscopy and X-ray photoelectron spectroscopy (XPS). The adsorption process of each component was studied using the quartz crystal balance (QCM). The QCM and XPS results reveal that the adsorption kinetics for phosphate and calcium ions is slow. However, the bovine serum albumin (BSA) totally covers the Ti surface rapidly. Because the passive film (titanium oxide) has acidic hydroxyl groups, the calcium ions would have a bridging effect on the electrostatic adsorption of phosphate ions as well as that of BSA. The polarization curves reveal that the adsorbed glucose permits the ionic diffusion of the oxygen to the electrode, while the BSA and fetal bovine serum (FBS) adsorbed after 7 days of immersion act as a diffusive barrier. The impedance measurement and data fitting to the electrical equivalent circuit model show that the resistance of the proteins/TiO2 interface, for Ti immersed in FBS, is higher than those obtained for BSA, due to the proteins present in the solution as well as the fact that the adsorbed proteins on the surface are greater.

Keywords
Titanium; Calcium phosphate; Bovine serum albumin; FBS; Corrosion
First Page Preview
Study of the interaction of inorganic and organic compounds of cell culture medium with a Ti surface
Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 6, Issue 2, February 2010, Pages 652–661
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering