Regensburg 2007 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 35: SYBM Bioinspired Materials

MM 35.9: Vortrag

Donnerstag, 29. März 2007, 17:15–17:30, H16

TiO2 nanotubes: a bio-inspired and bio-inspiring Material — •Sebastian Bauer¹, Jung Park², Klaus von der Mark², Eugeniu Balaur¹, and Patrik Schmuki¹ — ¹Department of Materials Science, Friedrich-Alexander-University, Martensstr. 7, 91058 Erlangen. — ²Department of Experimental Medicine I, Friedrich-Alexander-University, Glückstr. 6, 91054 Erlangen.

Self-organized porous structures have had a high impact in surface science due to the simplicity of fabricating nanostructured surfaces. Particularly highly ordered porous Al and Si have attracted significant scientific interest due to the potential applications in different fields. These structures can be achieved essentially by simple anodization under optimized electrochemical conditions. For Titanium we recently reported the preparation of self-organized nanotubular TiO2 layers on titanium surfaces by anodization in various electrolytes containing fluorides. We showed that tailoring the diameter of the formed nanotubes in a wide range (15 - 100 nm) can be achieved by varying the applied potential of the electrochemical setup. The resulting different nanoscale surfaces can be used to evaluate size effects on biorelevant reactions. We will discuss the wetting behavior of these nanoporous surfaces and show that it can be tailored from super-hydrophilic to super-hydrophobic by variation of tube diameter and by light interactions. Furthermore as titanium and its alloys are mainly used as implant materials it is also of interest to see how tissue reacts to the different nanoscales. To evaluate the influence of tube size, tests with rat mesenchymal stem cells were carried out and will be reported.