American Journal of Optics and Photonics

Volume 5, Issue 5, October 2017

  • Investigation of the Reflectivity Spectrum of the a-Plane Oriented ZnO Epilayers Grown by Plasma-Assisted Molecular Beam Epitaxy from the Gaussian Distribution

    Alioune Aidara Diouf, Bassirou Lo, Abel Sambou, Oumar Sakho, Aboubaker Chedikh Beye

    Issue: Volume 5, Issue 5, October 2017
    Pages: 50-54
    Received: Oct. 25, 2017
    Accepted: Nov. 03, 2017
    Published: Dec. 18, 2017
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    Abstract: The Photoluminescence spectra at low temperature of the a-plane oriented ZnO grown on r-plane (011-2) sapphire substrates by plasma-assisted molecular beam epitaxy, showed experimentally three types of excitons A, B and C. In the reflectivity spectra, authors used a program based on the theory of the spatial resonance dispersion Hopfield model to f... Show More
  • Optical Photocatalytic Degradation of Methylene Blue Using Lignocellulose Modified TiO2

    Yilkal Dessie Sintayehu, Abebe Belay Gemeta, Solomon Girmay Berehe

    Issue: Volume 5, Issue 5, October 2017
    Pages: 55-58
    Received: Feb. 08, 2017
    Accepted: Mar. 04, 2017
    Published: Dec. 19, 2017
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    Abstract: This paper reports the photo-catalytic activity and stability of Lignocellulose/TiO2 nanoparticles (NPs) was evaluated through using the decomposition of methylene blue (MB) as a testing model reaction under visible light irradiation (λmax > 420nm). The modified (NPs) (pH = 6.94 - 6.97) photocatalyst material was dried for 24 hours at the temperatu... Show More