Archive:: American Journal of Optics and Photonics:: Science Publishing Group

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: 25 October 2017

Accepted: 3 November 2017

Published: 18 December 2017

DOI: 10.11648/j.ajop.20170505.11

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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

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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: 8 February 2017

Accepted: 4 March 2017

Published: 19 December 2017

DOI: 10.11648/j.ajop.20170505.12

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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

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