Faculté des sciences Exactes: Recent submissions

  • Propriétés magnétiques des deux composes spinelle cu1.20cr1.20zr0.80se4 et cu1.25cr1.25zr0.75se4 
    Belakroum, K.; Ounnas, S.; Ouili, Z. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    Nous nous sommes intéressés, à l’étude des propriétés magnétiques des composés CuyCryZr2-ySe4 pour y = 1.20 et 1.25 par des mesures de susceptibilités magnétiques, aimantation et cycle d’hystérésis à l’aide du magnétomètre ...
  • The effect of ZnO additions on the porcelain mechanical properties 
    Kasrani, S.; Harabi, A. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    Le but de ce travail est de fabriquer une porcelaine jouissant de propriétés mécaniques remarquables, à partir de matières premières locales. Afin d'améliorer les propriétés mécaniques des échantillons 3 ,5 en poids d’oxydes ...
  • Fabrication and characterization of pure ZnO thin films deposited by Sol – gel method 
    Haya, S.; Halimi, O.; Boudine, B. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    ZnO thin films were prepared via Sol-gel method and were deposited on ordinary glass substrate using dip coating technique. These latters undergo optical annealing using UV irradiation, during 2 hours. The starting materials ...
  • Synthesis and characterization of Ag-doped ZnO thin films 
    Harzi, A.; Sebais, M.; Rahal, B.; Halimi, O. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    Zinc oxide (ZnO) is an important material with a wide bandgap of 3.4 eV and a relatively large exciton binding energy of 60 meV. It is also characterized by having excellent chemical stability, nontoxicity, and good ...
  • Electrochemical, morphological and structural properties of electrodeposited ZnS Thin films 
    Ghezali, K.; Mentar, L.; Boudine, B.; Azizi, A. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    Known as a n-type semiconductor, Zinc sulfide (ZnS) has the advantages of low consumption, nontoxic, andhigh exciton binding energy [1]. Therefore, it is widely used inSolar cells, infrared windows, light emitting and in ...
  • Simulation and fabrication study of porous silicon Bragg mirror for thin silicon solar cells application 
    Guermit, N.; Remeche, L.; Mahdjoub, A. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    Porous silicon Bragg mirror (BM) is one-dimensional photonic crystal, characterized by its high reflectivity stop band. Several studies have used it as back reflector to enhance optic confinement of low energy photons in ...
  • Development and characterization of iron oxide 
    Grine, A.; Boultif, A.; Chekour, L. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    The thin layers of iron oxide -Fe2O3 was prepared from the precursor (FeCl3, 6H2O) and HClhydrochloric acid by the dip-coating method. The developed thin films were subjected to analysis by XRD, IR and UV-Vis. Several ...
  • Synthèse et caractérisation des couches minces d’oxyde de nickel (NiO)par voie électrochimique 
    Ghalmi, Y.; Habelhames, F. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    Dans ce travail, descouches minces d’oxyde de Nickel (NiO)ont étépréparéespar électrodéposition en courant continu et en courant pulsé surdes plaquessemi-transparentes d’oxyde d’étain dopé par le fluor(FTO) à partir d’une ...
  • Study on the solid state reaction between Co/Ni bilayer film and silicon substrate 
    Fiad, H.; Bouabellou, A.; Sedrati, C. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    Billayers of pure Cobalt and nickel films were evaporated alternatively on (100) monocristalline silicone substrate. After annealing, in a vacuum furnace from 300 to 800°C during 20 min, the growth sequence of the phase’s ...
  • Thermodynamic assessment of the Co–Mg system supported by ab-initio calculations 
    Djenane, N.; Djaballah, Y. (Université Frères Mentouri - Constantine 1, 2016-12-14)
    The objective of this work is the thermodynamic modeling of the Co-Mg binary system using two methods: The CALPHAD method (Calculation of Phase diagrams) and the ab-initio calculations. CALPHAD is a very important method ...
  • Characterization of zinc sulfide nanoparticles encapsulated in zeoliteY by MEB and UV–Vis spectroscopy 
    Djebli, K.; Tebani, H. (Université Frères Mentouri - Constantine 1, 2016-12-14)
    The present study deals with ZnS semiconductor nanoparticules incorporated in zeolite. The zeolitheY is synthesized using sol–gel method. In second, the Zn2+ ions are fixed on the zeolite by ionic exchange. Finally, γ rays ...
  • New procedure calculation of Kβ/Kα intensity ratiosof low Z-elements 
    Daoudia, S.; Kahoula, A.; Kasric, Y.; Sahnounea, Y. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    Over the years, a large quantity of experimental data were reported in the literature for Kβ/Kα intensity ratios. Several researchers investigated Kβ/Kαvalues by using different methods according to different experimental ...
  • Study of back metal contact effect on the CZTS thin film solar cells performances 
    Cherouana, ABDELBAKI; Labbani, REBIHA (Université Frères Mentouri - Constantine 1, 2016-12-14)
    The output characteristics of solar cells are affected by several parameters. For thin film solar cells, the different interfaces play significant role on the performances of the cell. In this work, a numerical simulation ...
  • Structural, morphological and optical properties of Zn-doped CdS thin films prepared by chemical bath deposition 
    Cheriet, H. (Université Frères Mentouri - Constantine 1, 2016-12-14)
    Zinc-doped Cadmium Sulfide (ZCS)-thin films were grown on the glass substrates by using the chemical bath deposition technique. The correlation between X-ray diffractometer (XRD), atomic force microscopy (AFM) operated in ...
  • Theoretical investigation of structural, electronic and thermodynamic properties of CrO2compound 
    Berarmaa, K.; Hetacheb, N.; Charifi, Z.; Baaziz, H. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    The structural, electronic and thermodynamic properties of CrO2 compound have been performed by first-principles density functional calculations using the full linearized augmented plane wave (FP-LAPW) method as implemented ...
  • Study of fiber bragg gratings apodized with different apodiztion 
    Bouzida, A.; Triki, H.; El Akrmi, A. (Université Frères Mentouri - Constantine 1, 2016-12-14)
    A fiber Bragg grating (FBG) is a period perturbation of the effective refractive index in the core of an optical fiber. There are many types of Bragg gratings, most notably the normal or uniform Bragg gratings, tilted Bragg ...
  • Porous Surface Processes of Cu/SnO2 films in the detection of CH3OH-liquid, Prepared by Dip-Coating Method 
    Benzitouni, S.; Zaabat, M.; Ebothe, J.; Khial, A.; Rechem, D.; Cheriet, H.; Bouras, D. (Université Frères Mentouri - Constantine 1, 2016-12-14)
    In recent years, the detection methods of toxic chemical species and measurement of their concentration increased significantly. In the field of detection of chemical species, we must distinguish chemical sensors that play ...
  • Modified Becke-Johnson potential investigation of InAsxSb1-x semiconductors 
    Bentayeb, A.; Saadaoui, F.; Marbouh, N.; Bouhafs, K.; Driss-Khodja, F.; Arbouche, O. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    In this paper we have investigated structural, electronic, and thermodynamic properties of ternary InAsxSb1-x semiconductors within the full potential-linearized augmented plane wave (FP-LAPW) method based on the density ...
  • Study the Boron Spectrums Induced by Laser Sublimation 
    Benmebrouk, L.; Hamdat, B.; Khelfaoui, F. (Université Frères Mentouri - Constantine 1, 2016-12-14)
    This paper is based on the study of the emitted radiation by using LIBS technique (Laser Induced Breakdown Spectroscopy). It is an advanced technique allows analyzing solid, liquid and gaseous materials and it leads to ...
  • Calcul des propriétés électroniques ab-initio de VC 
    Benecheikh, R.; Boukraaet, O.; Belakroum, K. (Université Frères Mentouri - Constantine 1, 2016-12-15)
    La structure électronique des VC est fondamentalement intéressante et technologiquement import ante. Avec le code de simulation WIEN2k, nousavons effectué des calculs de propriétés électroniques en utilisant la théorie de ...

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