Abstract:

The presentation demonstrates approaches to achieve electrochemical fabrication of unique, self-ordered oxide geometries, such as, nanotubular arrays, that can be produced under controlled electrochemical conditions by selforganizing anodic oxidation of Ti metal surfaces. The morphological features, such as tube diameter and length, can be precisely controlled by a variation of the anodization parameters. The as-formed nanostructures can be crystallized to anatase or rutile nanotubes. Different doping and band-gap engineering approaches are feasible and will be discussed. Moreover, anodic fabrication of self-ordered oxide nanostructures on other metals and alloys will be presented.

Titanium oxide is a wide band-gap semiconductor that has a broad range of functional applications such as in dyesensitized solar cells, photocatalysis, or photoelectrochemical water splitting. Moreover it has a high degree of biocompatibility that give it a large potential for exploitation in biomedical devices. The talk will address synthesis, modification and applications of these anodic TiO2 nanotube arrays and other self-organized oxide nanoscale architectures.