Structural and optical properties of wet-chemistry Cu co-doped ZnTiO3 thin films deposited by spin coating method

Abstract

Z n 1-x TiO 3 :xCu (x=0%, 1%, 5%) thin films were prepared on glass and quartz substrates via the sol-gel method (wet-chemistry) and spin coating process. Structural and optical properties of the prepared films have been characterized by X-ray diffraction, field emission scanning electron microscope and UV-visible spectrophotometer. The doping of the thin films by different concentration of Cu ions exhibited change in structure from cubic to hexagonal system. The average crystalline size was calculated from X-ray line broadening and it is decreased from 21.88 nm (ZnTiO 3) to 11.21 nm (Zn 0.95 Cu 0.05 TiO 3). The fundamental optical constants of the thin films (refractive index, absorption coefficient, extinction coefficient, dielectric constant, band gap) were determined using the UV-Vis reflectance and transmittance spectroscopy. The analysis of the optical absorption data revealed that undoped film has indirect transition (E g = 3.22 eV) and the Cu-doped films have direct allowed transition with band gap energy increased to 3.96 eV.

Nano-architecture of CaO/Ag-chitosan nanocomposite by sol gel process: formation and characterization

“…Both pure nano-CaO-chitosan and loaded with nano-CaO-0.4 Ag-chitosan are chosen as the two representative samples to study the morphological characteristics by TEM and Fe-SEM, as manifested in Fig. (3). The main evidence of the internal structure of nano-CaO and nano-CaO-0.4 Ag into chitosan polymer matrix are confirmed with TEM images Fig.…”

“…Metal oxide (MO) nanoparticles have recently gotten a lot of interest because of their potential applications in optoelectronics, catalysts, adsorbents, and bactericides [1][2][3]. Because of their plentiful supply of raw materials, good thermal stability, low biological toxicity, and bio-degradability, MO nanoparticles have a wide range of applications [4,5].…”

High performance of talented copper/magneso-zinc titanate nanostructures as biocidal agents for inactivation of pathogens during wastewater disinfection

“…The peaks positioned at around 350 and 235 cm −1 are ascribed to the vibration-modes of v 2 (LO, TO), and v 4 (LO), respectively, which are the characteristic peaks of hexagonal ZnTiO 3 (Ahn et al 2005). Regarding the strong Raman, the peak appeared at around 723 cm −1 , mainly is attributed to A 1g mode of cubic Zn 2 TiO 4 (Hou et al 2005;El Nahrawy et al 2018).…”

Hybrid Chitosan/CaO-Based Nanocomposites Doped with Plant Extracts from Azadirachta indica and Melia azedarach: Evaluation of Antibacterial and Antibiofilm Activities

“…CaO nanoparticles were prepared by solgel method using Ca(NO3)2.H2O as Ca precursor. So, controlled sol-gel manufacture of Ca oxide nanoparticles is in uential for highly effective applications [9,10]. It is reported that the sol-gel solution method provides a high degree of control through the fabrications yields [11,12].…”