Abstract

Cadmium oxide (CdO) nanostructure was synthesized by solid-vapor deposition. Cadmium powder was heated to 1274 K in a tube furnace, and the resultant vapor was carried to the silicon substrate zone by an argon flow with a trace amount of oxygen. Field emission scanning electron microscopy revealed that the product was grass-like of Cadmium oxide 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 34 nm. Photoluminescence spectroscopy was conducted to investigate the optical properties of the nanostructures. The red-shift direct band gap energy of the CdO nanostructure was at 563 nm (2.2 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.

Key words: Nanostructure, cadmium oxide (CdO), solid-vapor deposition.