Beside longitudinal growth along the length, we show that ZnO nanorods also exhibit transverse growth, which is responsible for the formation of interpenetrative nanorods. The longitudinal growth is lead by the catalytically active Zn-terminated (0001) surface, while the oxygen-terminated (0001̄) surface is catalytically inactive, resulting in the formation of 'pencil' or 'bullet' shaped nanostructures.
Bibliographical noteFunding Information:
Thanks to the financial support from the US NSF NIRT ECS-0210332. Thanks to Daniel Moore for calibrating the furnace and Prof J. M. Zuo for providing the simulation program for CBED.
- A. Nanorods
- A. Nanowires