Affiliation: | 1.Department of Physics, Faculty of Science, Assiut University, Assiut, 71516, Egypt ;2.Department of Physics, Faculty of Science, Nanotechnology Research Unit, University of Tabuk, Tabuk, Saudi Arabia ;3.Department of Physics, Faculty of Science, Alexandria University, Alexandria, Egypt ;4.Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt ;5.Department of Physics, Faculty of Science, Fayoum University, El Fayoum, 63514, Egypt ;6.Chemistry Department, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia ; |