1. Department of Physics, Thin-film Laboratory, Physics Department, Faculty of EducationAin Shams University, Roxy Cairo 11757 Egypt
2. Nanoscience Laboratory for Environmental and Bio-medical Applications (NLEBA)Faculty of EducationDepartment of Chemistry, Faculty of EducationAin Shams University, Roxy Cairo,n 11757 Egypt
3. Department of Electronic Materials, Advanced Technology and New Material InstituteCity for Scientific Research and Technological Applications New Borg El Arab City 21934 Alexandria Egypt