Growth and characterization of different structured CdO using a vapor transport

Different structures of CdO (nano- and micro) were successfully synthesized using a vapor transport process (solid-vapor deposition) method for CdO powder on p-type silicon substrates at 1400 K with argon flow. Scanning electron microscopy revealed that the CdO morphology exhibited various shapes depending on the position of the Si substrates from the CdO powder in the furnace. Microstructured CdO included microrods and microcubes, microrods had diameters in the range of 600-990 nm and different lengths of more than 10 mu m. The X-ray diffraction pattern showed that the CdO has a cubic and polycrystalline structure. The optical properties of different structures of CdO were investigated by photoluminescence spectroscopy. Strong emission peaks were observed at 531 nm (2.34 eV) for the nanostructured and 524 nm (2.37 eV) for the rnicrostructured, which are ascribable to the near-band-edge emission of CdO. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.