Abstract
Single-crystal ZnGa 2 O 4 nanotubes were grown using well-aligned ZnO nanorods as templates by a vapor transport method. Ga and O vapors were reacted with ZnO to form ZnO/ZnGa 2 O 4 core-shell nanostructure, and single-crystal ZnGa 2 O 4 nanotubes were obtained by the removal of ZnO cores with a dilute HCl solution. The cathodoluminescence spectra indicate that the ZnGa 2 O 4 nanotubes emit near ultraviolet (UV) and blue lights (380 and 464 nm). The sharp near UV peak shall be beneficial for optical applications. © 2006 American Institute of Physics.