1. Laboratory of Material Physics and Subatomic, Faculty of Sciences, Ibn Tofail University, BP 133, 14000 Kenitra, Morocco
2. Laboratoire LN2E, Faculté des Sciences, Université Cadi Ayyad, B.P. 2390, 40000 Marrakech, Morocco
3. I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal
4. Instituto de Carboquímica ICB-CSIC, Miguel Luesma Castán 4, 50018 Zaragoza, Spain