Nanoengineering of functional Oxides
Ferroelectric Micro- and Nanotubes
|
Fundamental questions of finite size effects in one-dimensional systems such as nanowires and nanotubes are not yet clarified, although recent theoretical investigations predicted the stability of the ferroelectric polarization in nanowires down to a radius of only 1.2 nm. The fabrication of one-dimensional ferroelectric systems, such as nanowires and nanotubes, is thus of high scientific interest and will also have a high potential in applications such as nano-size actuators or piezoelectric scanners. We have used wetting of ordered porous templates and also conformal deposition of silicon and ZnO nanowires in order to prepare one-dimensional ferroelectric nanostructures with diameters ranging from 100 nm to several µm and lengths from a fraction of a µm to several hundred µm.
| Ferroelectric micro- and nanotubes: |
