1. Department of Materials Science and Nanotechnology Engineering, TOBB University of Economics and Technology, Söğütözü Cad. 43, 06560 Ankara, Turkey
2. Institut für Chemie Neuer Materialien, Universitat Osnabrück, D-49069 Osnabrück, Germany
3. UNAM Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey