The properties of TiO2 within rolled-up nanotechnology are explored. Micromotors and optical microresonators are presented as possible applications.

The properties of titania (TiO 2 ) are explored within the context of rolled-up nanotechnology, with particular attention to possible photonics applications. We show how the morphology of titania microtubes, as well as the TiO 2 phase and refractive index, can be controlled by properly tuning the microfabrication parameters. High refractive index TiO 2 tubes are proven to work as microresonators. The possibility of combining the rolling technique with an adequate prepatterning of the titania membrane could pave the way for the fabrication of a rolled-up diamond-like photonic crystal operating at visible frequencies, as substantiated by theory.