1. Department of Chemistry, Faculty of Science, King Khalid University , Abha , Saudi Arabia ;
2. Department of Chemistry, Faculty of Education, Ain Shams University , Cairo , Egypt ;
3. Research Center for Advanced Materials Science , King Khalid University , Abha , Saudi Arabia ;
4. Advanced Functional Materials and Optoelectronic Laboratory, Department of Physics, Faculty of Science, King Khalid University , Abha , Saudi Arabia ;
5. Nanoscience Laboratory for Environmental and Bio-medical Applications, Semiconductor Lab., Department of Physics, Faculty of Education, Ain Shams University , Cairo , Egypt