Controllable fabrication of nanowire-like CuO film by anodization and its properties

- The average diameter of single nanowire is only 25 nm and the length can be tuned.
- The method has the advantages of pure CuO phase and fast reaction rate.
- H2O-EtOH mix solvent can significantly improve optical and photocatalytic activities.
- Clarify the growth process in detail.