Abstract
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 1400K 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 600–990nm and different lengths of more than 10μm. 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 531nm (2.34eV) for the nanostructured and 524nm (2.37eV) for the microstructured, which are ascribable to the near-band-edge emission of CdO.
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