Synthesis of dendrite - like petals of CdO nanostructure

Cadmium oxide nanostructure was synthesized by solid-vapor deposition without catalyst. CdO powder was heated to 1320 K in a tube furnace, and the resultant vapor was carried to the silicon substrate zone by an argon flow. Field emission scanning electron microscopy revealed that the product was dendrite - like petals of CdO nanostructure. X-ray diffraction and energy dispersive X-ray techniques were used to characterize structural properties. The grown nanostructure had random orientations and a grain size of 30 nm. Photoluminescence spectroscopy was conducted to investigate the optical properties of the nanostructure. The red-shift direct band gap energy of CdO nanostructure was at 548 nm (2.26 eV), whereas that of CdO bulk was at 491 nm (2.5 eV). High-quality CdO nanostructure was grown on a Si substrate and then investigated.