1. Faculté Pluridisciplinaire Nador, LPMR, Université Mohammed Premier, Oujda BP 717-60 000, Morocco
2. Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
3. Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, United States
4. Institut d’Électronique, de Microélectronique et de Nanotechnologie (IEMN), UMR-CNRS 8520, Department of Physics, University of Lille, Villeneuve d’Ascq 59655, France