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    Wyświetlanie 1-5 z 5
    Tytuł:
    Amelioration of Ultrasonic Transducer to Study CuO Doped Thin Films
    Autorzy:
    Barakat, M. A. Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/176534.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ultrasonic
    thin films
    doping
    microstructure
    wedge
    Opis:
    Ultrasonic pulse echo technique was used to study cupric oxide (CuO) thin films. CuO thin films were prepared using sol gel technique. They were doped with Lithium (Li) (1%, 2% and 4%). Thin films’ thickness (d) and band gap energy (Eg) were measured. In addition, elastic moduli (longitudinal (L), shear (G), bulk (K) and Young’s (E)) and Poisson’s ratio (v) were determined to estimate the microstructure properties of the prepared films. The study ameliorated the used transducers to overcome their dead zone and beam scattering; wedges were developed. The results showed the effectiveness of these wedges. They enhanced transducers’ sensitivity by changing the dead zone, beam diameter, beam directivity and waves’ transmission. Also, the study noted that Li doping caused the improvement of CuO thin films to be more useful in solar cell fabrication. Li-CuO thin films had narrower band gap. Thus, they acquired a high quantum yield for the excited carriers; also they gained more efficiency to absorb solar light.
    Źródło:
    Archives of Acoustics; 2018, 43, 3; 487-495
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Gamma Irradiation on the Optical Properties of Mg doped CdO Thin films deposited by Spray Pyrolysis
    Autorzy:
    Hassouni, M.H.
    Mishjil, K.A.
    Chiad, S.S.
    Habubi, N.F.
    Powiązania:
    https://bibliotekanauki.pl/articles/412503.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    TCOs
    thin films
    optical properties
    doping film
    gamma radiation
    Opis:
    Thin films of CdO and 9 % Mg doped CdO doped have been prepared using spray pyrolysis technique. Transmission and absorption spectra were recorded in order to estimate these films. The deposited thin films were exposed to γ - rays. We have studied the transmission, absorptions and absorption coefficient as a function of photon energy before and after irradiation. The optical constants such as: reflectance, extinction coefficient, refractive index, real and imaginary parts of the dielectric constant and the electrical conductivity were calculated also.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 11; 26-37
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Heat Treatment on the Optical Properties of Cobalt Doped Stannic Oxide
    Autorzy:
    Hasan, J. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/411548.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    thin films
    chemical spray pyrolysis
    dilute magnetic semiconductor
    stannic oxide
    doping
    Opis:
    This study investigates The effect of annealing on The optical properties of (SnO2:Co) films prepared by spray pyrolysis (SP) technique at a glass substrate temperature (Ts = 773 K). The absorbance and transmittance spectra have been recorded in order to calculate the optical constant and the optical band gap energy of the films. It was found that the annealing affects all the parameters under investigations.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 9; 59-70
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of Co and Cu co-doping ZnO thin films on structural and optical properties
    Autorzy:
    Saoud, Tayeb
    Benramache, Said
    Diha, Abdallah
    Powiązania:
    https://bibliotekanauki.pl/articles/31342694.pdf
    Data publikacji:
    2023
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    ZnO
    thin films
    Co
    Cu
    co-doping
    TCO
    spray pneumatic method
    cienkie warstwy
    współdomieszkowanie
    Opis:
    Using a spray pneumatic technique, cobalt (Co) and copper (Cu) co-doped zinc oxide thin films were effectively deposited on a glass substrate. The goal of this work was to create a semiconductor with good optical and electrical properties by co-doping ZnO thin films with Cu and Co. The ZnO thin films obtained from the Co and Cu co-doping exhibit patterns of x-ray diffraction spectra that suggest they are hexagonal ZnO (wurtzite, JCPDS 36-1451). The thin film elaborated with 2 % Co and 7 % Cu has the lowest value of crystallite size (D = 14.67 nm). The transmission spectra demonstrate that all films have good optical transparency in the visible spectrum, with 7 % Cu achieving the highest transmission. Increasing Cu contents raised the band gap energy. The value at the minimum was 3.31 eV. The optical band gap’s broadening is a significant characteristic of advanced materials and may be useful in applications involving metal oxide nanostructures for visible light gas sensing.
    Źródło:
    Chemistry-Didactics-Ecology-Metrology; 2023, 28, 1-2; 171-178
    2084-4506
    Pojawia się w:
    Chemistry-Didactics-Ecology-Metrology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review of mechanical properties of diamond-like carbon coatings with various dopants as candidates for biomedical applications
    Autorzy:
    Jastrzębski, K.
    Jastrzębska, A.
    Bociąga, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/105981.pdf
    Data publikacji:
    2017
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    diamond-like carbon
    doping
    mechanical properties
    thin films
    biomaterials
    warstwy diamentopodobne
    właściwości mechaniczne
    cienkie warstwy
    biomateriały
    Opis:
    In the modern world, there is an increasing demand for implants, and technologies connected with their manufacturing. One of the possible paths of their development relates to the use of diamond-like carbon coatings (DLC) for the improvement of surface properties of the biomaterials used for implants. Further improvement of the mentioned properties can be induced by means of doping of the coating. Among the elements which are under current investigation of researchers, the following can be placed: Ag, Si, F, Cu, Ti, Ca and P. This paper reviews previously published experimental data concerning mechanical and physicochemical properties of DLC coatings doped with Ag, Si, Cu, Ti, Ca, F and P as candidates for biomedical applications. Although plenty of articles are published in the mentioned field, the differences of coatings’ synthesis techniques, various sources of dopants and substrates, as well as conducted experiments make no consistent view about a possible solution for their future implementation in medicine. Some of the selected dopants (Cu, Ca, P), still require better characterisation of mechanical properties. There is a necessity to conduct studies of mechanical and physicochemical properties of DLC coatings doped with these elements. This will enable adjustment of the necessary technological parameters to biomedical requirements.
    Źródło:
    Acta Innovations; 2017, 22; 40-57
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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