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Vol.5 , No. 3, Publication Date: May 30, 2018, Page: 56-62
 nanoparticles by the wet-chemical precipitation method with their transformation to ZnS-ZnO mixed system through the annealing treatment method. The characterizations of the system are made by using structural, electrical and optical techniques. The crystal structure has been changed from cubic ZnS phase to hexagonal ZnO phase in the midst of ZnS-ZnO mixed system with variation in the temperature by using X-ray diffraction technique (XRD). The morphology changed from the nanorods to nanoparticles with increasing annealing temperature as confirmed by transmission electron microscopy (TEM). To find the role of organic impurities trapped inside the material has been studied by the Fourier Transform Electron Microscopy (FTIR). The dc-electrical conductivities of the ZnS-ZnO system at room temperature were measured from I-V characteristics curves made by using the keithley electrometer and the semiconducting electrical behavior has been observed and found that the electrical conductivity from ZnS phase to ZnO phase decreases with the increasing annealing temperature. The change in the vibration bands related to sulfur and oxygen were also investigated in this system.&picture=http://www.aascit.org/aascit/decorators/img/journal/915.jpg)
| [1] | Geeta Rani, Miranda House, Department of Physics, University of Delhi, Delhi, India. |
This paper reports the synthesis of Zinc sulfide (ZnS) nanoparticles by the wet-chemical precipitation method with their transformation to ZnS-ZnO mixed system through the annealing treatment method. The characterizations of the system are made by using structural, electrical and optical techniques. The crystal structure has been changed from cubic ZnS phase to hexagonal ZnO phase in the midst of ZnS-ZnO mixed system with variation in the temperature by using X-ray diffraction technique (XRD). The morphology changed from the nanorods to nanoparticles with increasing annealing temperature as confirmed by transmission electron microscopy (TEM). To find the role of organic impurities trapped inside the material has been studied by the Fourier Transform Electron Microscopy (FTIR). The dc-electrical conductivities of the ZnS-ZnO system at room temperature were measured from I-V characteristics curves made by using the keithley electrometer and the semiconducting electrical behavior has been observed and found that the electrical conductivity from ZnS phase to ZnO phase decreases with the increasing annealing temperature. The change in the vibration bands related to sulfur and oxygen were also investigated in this system.
Keywords
ZnS–ZnO Mixed System, Nanoparticles, Nanorods, Annealing Temperature, DC Conductivity etc
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