1. Department of Engineering; University of Messina; 98166 Messina Italy
2. Laboratory of Physics of Materials and Nanomaterials Applied at Environment; Faculty of Sciences; University of Gabes; 6072 Gabes Tunisia
3. Department of Physics; King Abdulaziz University; 21589 Jeddah Saudi Arabia
4. Department of Physics; Al Imam Mohammad Ibn Saud Islamic University; 11623 Riyadh Saudi Arabia