Growth of ZnO nanosheets by hydrothermal method on ZnO seed layer coated by spin-coating technique
| Autor: | Somyod Denchitcharoen, Pichet Limsuwan, Nontakoch Siriphongsapak |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Spin coating
Materials science Band gap Scanning electron microscope Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hydrothermal circulation 0104 chemical sciences Crystallinity Chemical engineering Transmittance Particle 0210 nano-technology Layer (electronics) |
| Zdroj: | Materials Today: Proceedings. 4:6146-6152 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2017.06.108 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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