1. Advanced Materials and Nanotechnology Research LaboratoryFaculty of Materials Science and EngineeringK. N. Toosi University of Technology 1999143344 Tehran Iran
2. Catalonia Institute for Energy Research—IREC 08930 Sant Adrià de Besòs Spain
3. Catalan Institute of Nanoscience and Nanotechnology (ICN2)CSIC and BISTCampus UAB Bellaterra 08193 Barcelona Spain
4. Departamento de FísicaUniversidad Nacional de ColombiaCiudad Universitaria 111321 Bogotá Colombia
5. ICREA Pg. Lluis Companys 23 08010 Barcelona Spain