Abstract
This paper describes, Synthesis of zinc oxide nanorods (ZnO NRs) using hydrothermal technique at different growth time. The structural and morphological properties were characterized by X-ray diffraction (XRD), Energy Dispersive X-Ray (EDX) and Field Emission Scanning Electron Microscope (FE-SEM). The ZnO NRs were obvious hexangular wurtzite structure and preferentially oriented along the c-axis (002) and growth vertically to the substrates. The optical properties were studied. From UV-Visible spectrophotometer and Photoluminescence (PL), the optical band gap energy of all ZnO NRs samples (S1, S2 and S3) were calculated to be (3.425 eV, 3.4 eV, 3.425 eV) respectively. Also, the effect of growth time on ZnO nanorods was studied.
Highlights
Nanotechnology is an emerging, highly interdisciplinary field
The crystal structure and microstructure of the as synthesized zinc oxide nanorods (ZnO NRs) and seed layer were studied through X-ray diffraction (XRD)
Fig. (3) shows the XRD pattern of the Zinc oxide (ZnO) seed layer grown on glass substrate(So)
Summary
Nanotechnology is an emerging, highly interdisciplinary field. It has the ability to manipulate matter at an atomic scale. Different synthesis methods have been devised for ZnO nanostructures such as vapor transport process [19, 20], spray pyrolysis [21, 22], thermal decomposition [23], chemical bath deposition(CBD) and hydrothermal synthesis [24,25], sol-gel processing [26], direct precipitation and co-precipitation [27,28,29]. 2.2 Preparation of the ZnO seed layers conventional spin coater was used to deposit the precursor solution on the cleaned substrates at 3,000 rpm for 30 s. The obtained samples washed several times in ethanol and distilled water and dried at 80°C for 30 min the thin film were annealed at 350°C for 2 h to remove residual organic materials [26]. The growth process of the ZnO NRs is presented in fig. (2)
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