Triangular radial Nb 2 O 5 nanorod growth on c -plane sapphire for ultraviolet-radiation detection.

Nb 2 O 5 nanostructures with excellent crystallinities were grown on c -plane sapphire and employed for ultraviolet-(UV)-radiation detection. The triangular radial Nb 2 O 5 grown on the c -sapphire substrate had a 6-fold symmetry with domain matching epitaxy on the substrate. Owing to the radial growth, the nanorods naturally connected when the deposition time increased. This structure can be used as a UV-detector directly by depositing macroscale electrodes without separation of a single nanorod and e-beam lithography process. It was confirmed that electric reactions occur at different UV irradiation wavelengths (254 nm and 365 nm).