Sturcture and optical properties of one dimensional ZnS nanosturctures synthesized using a single evaporation process

초록

ZnS nanostructures with different morphologies and microstructures were synthesized using a single thermal evaporation process. The microstructure and photoluminescence properties of the ZnS nanowires produced in four different temperature zones were examined. Scanning electron microscopy showed that as the substrate temperature decreased. the morphology of the ZnS nanowi res changed from a longer curved morpholog) to a shorter earth worm-like morphology. Photolum inescence Spectroscopy relealed a decrease in emission intensity with decreasing substrate temperature. ZnS nanostructures synthesized in temperature zones 2, 3 and 4 (~ 900, ~ 800, and ~ 700 respectively) showed green emission, whereas those synthes ized in temperature zone 5 (~600 cC) showed yellow emission. The origins oflhe emissions are al so discussed.