Growth of ZnO nanosheets by hydrothermal method on ZnO seed layer coated by spin-coating technique
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Publication Details
Author list: Denchitcharoen S., Siriphongsapak N., Limsuwan P.
Publisher: Elsevier
Publication year: 2017
Volume number: 4
Issue number: 5
Start page: 6146
End page: 6152
Number of pages: 7
ISSN: 2214-7853
eISSN: 2214-7853
Languages: English-Great Britain (EN-GB)
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Abstract
In this work, ZnO nanosheets that are dense and uniform can be synthesized by hydrothermal method on ZnO seed layer coated by spin-coating technique. The precursor concentrations of ZnO seed layer were varied from 2 to 22 mM. The seed layer at each concentration of 2, 10, 14, and 22 mM was used to synthesize ZnO nanosheets with the same hydrothermal condition. Then, ZnO seed layer and ZnO nanosheets were characterized by scanning electron microscope (SEM), X-ray diffraction technique (XRD), and UV-visible spectrophotometer (UV-vis) to study surface morphology, crystal structure,% transmittance, and optical band gap. The results showed that particle sizes on the surface of the seed layer were formed to be bigger and the XRD intensity of (100) peak tended to decrease with increasing precursor concentrations. The ZnO nanosheets on the seed layer at 14 mM have the sheet thicknesses from 10 to 25 nm and diameters from 0.2 to 0.5 μm. Moreover, ZnO nanosheets showed high crystallinity in (002) plane, high transparent in visible region, and optical band gap of about 3.33 eV. © 2017 Elsevier Ltd. All rights reserved.
Keywords
Spin-coating, ZnO nanosheets, ZnO seed layer
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