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    Wyświetlanie 1-6 z 6
    Tytuł:
    3D-AFM Nano-structural Features and Magnetic Properties of Indium-Doped Vanadate Ceramic Ca3-xInxVO8
    Autorzy:
    Elsabawy, Khaled M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1186749.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Magnetic properties
    SE-microscopy
    Semiconductors
    Solution route synthesis
    X-ray diffraction
    Opis:
    Doped vanadate ceramics with general formula Ca3-xInxVO8 were synthesized by using two different precursors ( oxalate & citrates) to get maximum homogeneity inside the bulk of the material where x = 0.05 and 0.25 mole. Structural and microstructural properties were monitoring by using both of XRD and SEM evaluating that indium doped - calcium vanadate ceramic has the semiconducting classical doubly perovskite phase as proved in the X-ray diffractogram, grain size of the material bulk was found to be in between 1.57- 2.23 μm which are lower than those reported in literatures .Magnetic measurements indicated that the In- doped- calcium vanadate ceramic exhibits an semiconducting behavior confirming that indium- hole dopings enhance the paramagnetic character and semi-conduction mechanism of the hexagonal perovskite phase. Furthermore 3D-AFM investigations were made to study effect of indium doping on the surface topology and grain size in the material bulk.
    Źródło:
    World Scientific News; 2016, 32; 48-59
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and Optical Properties of CuO Doped (Li) Thin Films Prepared by Sol-Gel Technique
    Autorzy:
    Kadhim, Raheem G.
    Kzar, Kzar
    Powiązania:
    https://bibliotekanauki.pl/articles/1188084.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    CuO
    Li
    Sol-gel
    spin coating
    x-ray diffraction
    UV- Visible
    Opis:
    CuO and (Li–doped CuO) thin films have been prepared on glass substrates by sol-gel method using spin coating technique. X-ray diffraction (XRD) results reveal that the deposited CuO and (Li– doped CuO) thin films monoclinic crystal structure and the grain size increase with increasing concentration Li. The optical transition in the CuO and (Li– doped CuO) thin films are observed to be allowed direct transition. The value of the optical energy gap decreases with increasing of (Li) for all samples.
    Źródło:
    World Scientific News; 2016, 56; 56-66
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Nano-Copper – Substituted Lead Zirconate as Surface Catalyst for Oxidative Degradation of Organic Dye
    Autorzy:
    Elsabawy, Khaled M.
    Bediwya, Marwa M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193007.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Cu-doped-PLZ
    Fuchsine dye
    Kinetics
    SE-microscopy
    X-ray Diffraction
    oxidative Degradation
    Opis:
    The oxidative decomposition reactions of fuchsine dye on the surface of nano-catalyst Cu0.5Pb0.5ZrO3 were studied carefully in an aqueous solution in the presence of H2O2 under condition of pseudo-first order reaction. The catalyst was prepared by solid state route using pure nominal composition of metal oxides. The structural and micro-structural properties of the catalyst were characterized well by XRD, SEM and AFM respectively. Many of the kinetic parameters were investigated in this article, results obtained indicated that, the rate of oxidative degradation of acid fuchsine dye was found to be pH-dependent. The mechanism was proposed and the activation parameters were calculated.
    Źródło:
    World Scientific News; 2016, 31; 111-124
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metal-titanium oxide / quantum dot porous silicon / silicon-metal solar cell
    Autorzy:
    Abd, Ahmad Naji
    Mishjil, Khudheir A.
    Abdulsada, Ali Hamid
    Habubi, N. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177996.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    AFM
    FTIR
    TiO2
    X-Ray diffraction
    XRD
    electrochemical etching p-type silicon wafer
    nanocrystalline porous silicon
    Opis:
    In this paper, the nanocrystalline porous silicon (PSi) films are prepared by electrochemical etching of p-type silicon wafer with current density 7 mA/cm2 and etching times on the formation nano-sized pore array with a dimension of around different etching time. The films were characterized by the measurement of XRD, FTIR spectroscopy and atomic force microscopy properties (AFM). We have estimated crystallites size from X-Ray diffraction about nanoscale for porous silicon and Atomic Force microscopy confirms the nanometric size Chemical fictionalization during the electrochemical etching show on the surface chemical composition of PS. The etching possesses inhomogeneous microstructures that contain a-Si clusters (Si3–Si–H) dispersed in amorphous silica matrix. From the FTIR analyses showed that the Si dangling bonds of the as-prepared PS layer have large amount of Hydrogen to form weak Si–H bonds. The atomic force microscopy investigation shows the rough silicon surface, with increasing etching process (current density and etching time) porous structure nucleates which leads to an increase in the depth and width (diameter) of surface pits. Consequently, the surface roughness also increase.
    Źródło:
    World Scientific News; 2018, 96; 134-148
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and Study of CdS thin films at different concentration thiorea by chemical bath deposition (CBD) method
    Autorzy:
    Anwar, H. Ali
    Jassem, Sarah A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193882.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Atomic Force Microscopy
    CdS nanostructure
    CdS thin films
    UV-Vis
    X-Ray Diffraction
    XRD
    chemical bath deposition
    nanostructure
    Opis:
    CdS nanostructure are prepared by chemical bath deposition CBD method using different thiourea concentrations. The thiourea concentration effect for CdS nanostructure deposited on glasses substrate have been studied. CdS nanostructure give important analysis of X-ray diffraction (XRD), optical transmittance using (UV-Vis) spectroscopy, in addition to characterization of Atomic force microscopy (AFM) to analyze surface morphology of a film and to determine the grain size have proved a good agreement with experimental and theoretical results.
    Źródło:
    World Scientific News; 2015, 23; 73-89
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and investigation of optical, structural, and morphological characteristics of nanostructured TiO2-ZnO thin films
    Autorzy:
    Yasir, Nagham Abdulameer
    Hlail, Alzubaidy Muneer
    Mohsin, Ali Kamel
    Powiązania:
    https://bibliotekanauki.pl/articles/1070855.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Crystallite size
    Photocatalysis
    Sol–gel process
    Titanium dioxide
    X-Ray Diffraction
    Zinc oxide
    drop casting
    energy gap
    thin films
    Opis:
    TiO2-ZnO thin films have been prepared by using drop casting technique. The optical, structural, and morphological properties of nanostructured TiO2-ZnO thin films deposited by drop casting technique was studied by using several experimental techniques were used to characterize optical, structural, and morphological properties; X-Ray Diffraction (XRD) was used to study the crystal structures, the crystallite size, the dislocation density, and the number of crystallites per unit area of TiO2-ZnO thin films. The surface topography, surface roughness parameters, and average grain size for all samples were done by Atomic Force Microscopy (AFM) micrograph which confirm the existence of Nano-structured thin films. The optical energy gap of the TiO2-ZnO thin films was determined by using UV spectroscopy. It was found that one type of basic electrons transitions, through which the values of the optical energy gap for all the prepared thin films which are allowed direct transition.
    Źródło:
    World Scientific News; 2019, 123; 87-101
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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