Effect of reaction time on the physical properties of CuO/PS nanostructures prepared via the hydrothermal method
| Autor: | Abdul-Majeed E. Al-Samarai, Ahmad Z. Al-Jenaby, Asmiet Ramizy |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Photoluminescence Materials science 02 engineering and technology Substrate (electronics) 021001 nanoscience & nanotechnology Porous silicon 01 natural sciences Hydrothermal circulation Grain size Crystal Chemical engineering 0103 physical sciences Thin film 0210 nano-technology Monoclinic crystal system |
| Zdroj: | Materials Today: Proceedings. 42:2840-2844 |
| ISSN: | 2214-7853 |
| Popis: | In this work, the hydrothermal method was utilised to prepare CuO nanostructures on porous silicon (PS) substrate. Structural, morphological and optical properties of the seed layer and samples prepared with different reaction times of 12 and 24 h were investigated. XRD analysis showed that the seed layer and CuO films treated for 12 and 24 h exhibited a monoclinic crystal structure with crystal sizes of 21, 13.7 and 9.95 nm. AFM analysis demonstrated that the grain size and roughness of CuO thin films decreased with the prolongation of hydrothermal reaction time. FESEM analysis showed that morphology changed from seed-like to nanosheets with the increase in reaction time. EDX analysis revealed the chemical composition and elemental state of CuO nanoparticles. The photoluminescence spectra of CuO/PS indicated that energy band gaps ranged from 1.99 eV to 2.83 eV due to the quantum confinement effect and the temperature and pressure effect in the autoclave. |
| Databáze: | OpenAIRE |
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