| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 180306 | Electrochemistry Communications | 2011 | 4 Pages |
In the present work we demonstrate that amorphous anodic TiO2 nanotubes show upon annealing a tube diameter dependent phase stabilization. For tube diameters < 30 nm the formation of rutile is observed while for larger diameters anatase is formed. This effect is induced by the presence of the metallic substrate — in its absence all tube diameters are converted to anatase. As the nature of the stable phase strongly affects electronic, optical and biomedical properties of TiO2, the finding is of a high significance for many applications of TiO2 nanotubes.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► Anodic TiO2 nanotubes show, upon annealing, tube diameter dependent phase stabilization. ► For small diameter TiO2 nanotubes (< 30 nm) rutile is formed while for larger diameters (> 30 nm) anatase is formed. ► Effect on size dependent anatase/rutile phase stabilization is induced by the presence of the metallic substrate. ► In absence of a substrate all tube diameters are converted to anatase.
