Controlling of ZnO nanostructures morphology for guiding the structural and optical properties
نویسندگان
چکیده
Most of the applications of the nanostructures dependent on the morphologies which affects the opto-electronics properties. This research article provides a pathway of guiding optical properties like band-gap and fluorescence properties by controlled growth of nano-rods, flowers, -needles ortubes without external chemical doping, by simple hydrothermal method by controlling over synthesis parameter, temperature. Ultraviolet-visible (UV-vis) spectroscopy shows enhancement in the band gap, with increasing synthesis temperature . Photoluminescence (PL) data indicates existence of defect in the nanomaterials, which is more elaborately explained by schematic band diagram. Tuning optical properties by materials morphology is a very important parameter for device applications which is empirically demonstrated here. The sharp and strong peak in Raman Spectroscopy is observed at ~438 cm, assigned to the E2 optical mode of the ZnO, characteristic peak for the wurtzite hexagonal phase with highly-crystalline.
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