Structure and optical properties of one-dimensional ZnS nanostructures synthesized using a single evaporation process

Title
Structure and optical properties of one-dimensional ZnS nanostructures synthesized using a single evaporation process
Authors
이종무
Issue Date
2013
Publisher
PHYSICA SCRIPTA
Series/Report no.
PHYSICA SCRIPTA; vol.T157 no.00 startpage 014043 endpage 014048
Abstract
Zinc sulfide (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 nanowires changed from a longer curved morphology to a shorter earthworm-like morphology. X-ray diffraction (XRD) shows that all samples were mixtures of a zincblende-structured ZnS phase and a wurtzite-structured ZnS phase and that dominance of the zincblende phase tends to increase with decreasing substrate temperature. The zincblende phase appeared to be dominant regardless of the substrate temperature. A closer comparison of the XRD patterns of the products in the different temperature zones showed that dominance of the zincblende phase tends to increase with decreasing substrate temperature. Photoluminescence spectroscopy revealed a decrease in emission intensity with decreasing substrate temperature. ZnS nanostructures synthesized in temperature zones 2, 3 and 4 ( 900, 800 and 700 C, respectively) showed green emission, whereas those synthesized in temperature zone 5 ( 600 C) showed yellow emission. The origins of the emissions are also discussed.
URI
http://dspace.inha.ac.kr/handle/10505/32795
ISSN
0031-8949
Appears in Collections:
College of Engineering(공과대학) > Materials Science & Engineering (신소재공학) > Journal Papers, Reports(신소재공학 논문, 보고서)
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