Growth of ZnO Nanorods by Template-Free Sol-Gel Dip-Coating Technique: Effect of Pre-Annealing Temperature

Abstract:

In this work, we studied the effect of pre-heating temperature on the structural and optical properties of ZnO nanorods grown by free template sol-gel dip-coating technique. The prepared films were pre-heated at different temperatures: 240, 260, 280 and 300 °C, then annealed at 500 °C for one hour. The structural properties of the prepared samples were investigated by X-ray diffraction (XRD) and the surface morphologies were studied by scanning electron microscope (SEM). The optical properties were studied by means of UV-Visible spectrophotometer. The XRD diffraction spectra show that all the prepared samples have a ZnO wurtzite structure with a preferential orientation along (002) axis. SEM micrographs revealed the formation of well-aligned ZnO nanorods for the sample preheated at 280 °C. The prepared ZnO nanorod structured thin films are highly transparent in the visible region with an average transmittance above 85 % in the 400–800 nm wavelength range.

• Periodical: Defect and Diffusion Forum (Volume 397)
• Pages: 111-117
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.397.111
• Online since: September 2019
• Authors: Djamal Eddine Guitoume, Fayssal Ynineb, Djelloul Mendil, Hichem Farh, Nadhir Attaf, Mohamed Salah Aida
• Keywords: Dip-Coating, Free-Template, Pre-Annealing, Sol-Gel, ZnO Nanorods

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