
Hanane SaidiUniversité de Biskra · Department of Earth Sciences
Hanane Saidi
Professor
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50
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Publications
Publications (50)
In this work, transparent undoped and Al-doped TiO 2 thin films have been deposited on heated glass substratesthrough spin coating sol-gel processingtechnique.PristineTiO 2 and Al-doped TiO 2 thin filmswere synthesized with different Al doping ratio ranged from 0 to 6%.The influence of Al doping on the structural, morphological, optical, and electr...
Photocatalytic application has been of large interest due to its new technology for organic pollution. Among the photocatalyst, titanium dioxide thin film is known as a photocatalyst for the elimination of organic pollutants. In this research, the structural and optical properties of TiO2 thin films prepared on glass substrates were studied, using...
Titanium oxide TiO2 thin films have been deposited on heated glass substrates at 0.02, 0.05, 0.1and 0.2 M of precursor concentration by ultrasonic spray process, using the titanium tetra iso-prop-oxide (TTIP) as Ti source. The present study focuses on the physical properties of TiO2 thin film as a function of precursor concentration. Furthermore, d...
Thin films of pure TiO2 and Ti1-xGaxO2 were prepared by the sol–gel method. The photocatalytic activity is tested by the degradation of the methylene blue (MB) dye under solar irradiation. Different methods are used in the characterization of materials and are X-ray diffraction, UV–visible. The results obtained show that the Ti1-xGaxO2 samples exhi...
In this work, high transparent TiO2 nano-crystallinethin films have been prepared by a simple sol–gel spin coating technique.The effect of the number of layers on physical properties of TiO2 thin films were studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Vis spectrophotometer, and four probes measurement.The X...
In this study, high quality Zinc oxide (ZnO) thin films, with improved properties, were prepared by a cost-effective ultrasonic spray pyrolysis technique via a careful optimization of the used ultrasonic wave amplitude. The deposition process was performed on glass substrate and were subsequently annealed at 400°C.We investigated the effect of vari...
In this work, titanium dioxide thin films have been deposited on heated glass by ultrasonic spray technique, using the titanium tetra-isopropoxide (TTIP) as the precursor. The influence of growth temperature on the crystalline structure, morphological and optical properties was investigated. X-ray diffraction, Ultraviolete Visible spectrum and Scan...
In this study, we report the influence of Bromine (Br) doping levels on certain Zinc Sulphide (ZnS) thin films physical properties. Br doped ZnS films were deposited on glass substrates using ultrasonic spray method with a varied Br concentration from 0% to 2% to investigate its incorporation effect and identify the accurate doping amount. The Br-d...
In the present work, high quality Pb doped ZnS thin films were deposited on glass substrates at 450°C using spray ultrasonic technique. The dependence of the structural, morphological and optical properties of the films on the lead (Pb) doping amount was investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis–NI...
Thin films of titanium dioxide (TiO2) were synthesized by sol gel (spin coating) process on glass substrates. The structural, morphological, optical, and electrical properties of TiO2 thin films were examined as a function of solution concentration CS varied between 0.1 M and 0.5 M at 500°C as the annealing temperature. The elaborate samples were c...
Previous studies have shown that pure SnO 2 thin films have low electrical and optical properties. These poor properties of the SnO 2 can be enhanced by adding the appropriate percentage of fluorine. In this work, F-SnO 2 thin films of high conductivity and transmittance have been prepared in the University of Biskra using chemical ultrasonic spray...
Indium oxide (In2O3) thin films have been deposited by sol gel spin coating technique for different molar concentrations on glass substrates. X-ray diffraction spectra confirmed that the films have a polycrystalline nature with high preferred orientation along (222) plane corresponding to In2O3 cubic structure. Scanning electron microscope images s...
The aim of this work is to investigate the dependence of ZnS thin films structural and optical properties with the solution flow rate during the deposition using an ultrasonic spray method. The solution flow rate ranged from 10 to 50 mL/h and the substrate temperature was maintained at 450 °C. The effect of the solution flow rate on the properties...
ZnS films have important applications in photovoltaic devices. In the current study, the ZnS films were deposited by ultrasonic spray method on heated glass substrate at temperature equal to 450 °C.
In this article, we report the effect of deposition time on the different structural, optical and electrical properties of ZnS. All the samples obtaine...
In this study, we will deal with the influences of deposition time on structural, optical and electrical properties of SnxSy films which have grown through ultrasonic spray technique. The SnxSy thin films are deposited on glass substrate at 300°C with a deposition time of t=2min-10min, using two precursors: tin (II) chloride and tin (IV) chloride,...
We investigated the structural, electrical and optical properties of zinc oxide thin films as the n-type semiconductor. In the present paper, the effect of substrate temperature on the synthesis of ZnO thin films was carried out from 250°C to 500°C. ZnO thin films were deposited on glass substrates via ultrasonic spray technique with 0.2mol/L of...
Tin sulfide (Snx
Sy
) thin films were prepared by a spray ultrasonic technique on glass substrate at 300 °C. The influence of deposition time t = 2, 4, 6, 8 and 10 min on different properties of thin films, such as (XRD), photoluminescence (PL) and (UV) spectroscopy visible spectrum and four-point were investigated. X-ray diffraction showed that th...
Tin sulfide (Sn x S y / thin films were prepared by a spray ultrasonic technique on glass substrate at 300 ı C. The influence of deposition time t D 2, 4, 6, 8 and 10 min on different properties of thin films, such as (XRD), photoluminescence (PL) and (UV) spectroscopy visible spectrum and four-point were investigated. X-ray diffrac-tion showed tha...
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SnS2 thin film was deposited by spray ultrasonic technique, on pretreated glass substrates. The effect of SnS 2 concentration on different optical properties of SnS 2 thin films was investigated. X-ray diffraction study indicates that films have a hexagonal structure with preferential plan (0 0 1). SEM characterization technique shows that the morp...
Transparent conducting n-type SnO2 semiconductor films were fabricated by employing an inexpensive, simplified spray ultrasonic technique using an ultrasonic generator at deferent substrate temperatures (300, 350, 400, 450 and 500 °C). The structural studies reveal that the SnO2 films are polycrystalline at 350, 400, 450, 500 °C with preferential o...
In the present paper, the structural, electrical and optical properties of zinc oxide thin films were studied as a function of solution molarity. The ZnO thin films were deposited on glass substrates via the ultrasonic spray technique at 350°C. Polycrystalline films with a hexagonal wurtzite structure with (100) and (002) preferential orientation c...
We investigated the structural, electrical and optical properties of zinc oxide thin films as the n-type semiconductor. In the present paper, the effect of substrate temperature on the synthesis of ZnO thin films was carried out from 250∘C to 500∘C. ZnO thin films were deposited on glass substrates via ultrasonic spray technique with 0.2mol/L of zi...
SnS2 thin film was deposited by spray ultrasonic technique, on pretreated glass substrates. The effect of SnS2 concentration on different optical properties of SnS2 thin films was investigated. X-ray diffraction study indicates that films have a hexagonal structure with preferential plan (0 0 1). SEM characterization technique shows that the morpho...
Indium oxide (In2O3) thin films are successfully deposited on glass substrate at different deposition times by an ultrasonic spray technique using Indium chloride as the precursor solution; the physical properties of these films are characterized by XRD, SEM, and UV-visible. XRD analysis showed that the films are polycrystalline in nature having a...
In this work, we used a system based on ultrasonic
spray pyrolysis technique. By witch, we have deposited
thin films of zinc oxide (ZnO) with the variation of solution
flow rate from 50 ml / h to 150 ml / h, and set other parameters such as the concentration of the solution, the deposition time, substrate temperature and the nozzel -substrate dista...
We present a new approach based on the formulation of the integrodifferential quadrature method (hereafter called IDQ) to handle Volterra's and Fredholm's equations. This approach is constructed
and tested with some realistic numerical examples using the basic
computational aspects.
We develop the discrete derivatives representation method (DDR) to find the physical structures of the Schrodinger equation in which the interpolation polynomial of Bernstein has been used. In this paper the particle swarm optimization (PSO for short) has been suggested as a means to improve qualitatively the solutions. This approach is carefully h...
The ground energy and some low lying excited energies and the corresponding wavefunctions for the generalized Killingbeck potential are investigated within the context of the recently introduced differential quadratic method. Highly accurate energy eigenvalues and an excellent agreement were found compared with the power series expansion and the su...
A perturbation method is introduced in the context of dynamical system for solving the nonlinear Korteweg-de Vries (KdV) equation.
Best efficiency is obtained for few perturbative corrections. It is shown that, the question of convergence of this approach
is completely guaranteed here, because a limited number of term included in the series can des...
This paper deals with an integration method of the Schrödinger equation for the bound states, developed within the context of the recently introduced differential quadratic (DQ) method. It is shown also that this result may be extended to the case of a system of coupled differential equations. An application is also proposed and examined.
In our earlier work, we have developed the differential quadratic method (DQ) to find the physical structures of the Schrödinger equation in which the interpolating points of Tchebychev have been used. In this paper the particle swarm optimization (PSO for short) has been suggested as a means to improve qualitatively the solutions. This approach is...
The Silences of the Archives, the Reknown of the Story.
The Martin Guerre affair has been told many times since Jean de Coras and Guillaume Lesueur published their stories in 1561. It is in many ways a perfect intrigue with uncanny resemblance, persuasive deception and a surprizing end when the two Martin stood face to face, memory to memory, befor...
The proposed study will focus on the evaluation of the bound states of the Schrödinger equation in the framework of the central potential using a differential quadratic method (hereafter called DQ). We present two realistic examples to argue an excellent performance of the proposed method, compared with other results for the same potentials.
In a previous work, we have introduced the generalized differential quadratic method (called GDQ) to handle the Schrödinger equation. This paper deals with a particular situation in which an application to the non polynomial potential is considered. The results are compared with some numerical examples for the same potential of interest.