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  • Küçük Resim
    Öğe
    A study of the influences of transition metal (Mn,Ni) co-doping on the morphological, structural and optical properties of nanostructured CdO films
    (Springer, 2018) Gurbuz, Elif; Aydin, Rasit; Sahin, Bunyamin
    In this paper, a systematic investigations on the effects of transition metals such as Mn and Ni-dopant on physical properties of cadmium oxide (CdO) thin films coated on soda lime glass substrates by using SILAR method have been reported. The characterizations of un-doped, Mn-doped (Cd-0.99 Mn0.01O) and Mn/Ni double doped CdO [(Cd0.99-xMn0.01NixO)(0 <= x <= 0.001)] films were investigated by SEM, EDX, XRD and UV-Vis spectrophotometry to determine the morphological, structural and optical properties, respectively. SEM analysis showed that the surface morphologies of the CdO films were influenced by Mn doping and Mn/Ni co-doping. The EDX result verified the presence of expected elements Cd, O, Mn and Ni in the growing solution. The crystal phases of the samples and their crystallinity quality have been investigated by XRD measurements. The X-ray diffractograms show all the diffraction peaks are highly intense also they demonstrate the preferential orientations of (111) and (200) directions. Optical investigations revealed red shift with Mn doping and Mn/Ni co-doping in the absorbance spectrum.
  • Küçük Resim
    Öğe
    Zn-doping to improve the hydration level sensing performance of CuO films
    (Springer Heidelberg, 2018) Gurbuz, Elif; Sahin, Bunyamin
    Many previous works have reported the importance of hydration level monitoring especially during the high exercise activity in warm environments. Herein, we report the hydration level monitoring properties of the ZnxCu1-xO (x=0, 0.05 and 0.1) nanostructures in the wide range of artificial sweat concentrations. Nanostructured CuO films were sequentially synthesized via the successive ionic layer adsorption and reaction (SILAR) method. The morphological, microstructural, optical, and sensing response of the produced samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), (UV-vis) spectrophotometer and current-voltage (I-V) measurements, respectively. XRD patterns of the films revealed that the mean crystallite size is decreasing from 13.50 to 11.03nm with increasing Zn content. From UV-visible spectrum, it was determined that the optical energy band gap (E-g) of the films changes with the Zn content in the growth solution and it was in the range of (1.40-1.53) eV. A considerable improvement in hydration level sensing properties was noticed for 1 M% Zn-doped CuO films for all concentration levels. The results provide a new approach to fabricate high performance nanostructured metal oxide based hydration level monitoring devices.