1. Physics Department; Faculty of Arts and Sciences, Hitit University; Corum 19030 Turkey
2. Department of Polymer Science and Technology; Middle East Technical University; Ankara 06800 Turkey
3. Department of Chemistry; Middle East Technical University; Ankara 06800 Turkey
4. Department of Biotechnology; Middle East Technical University; Ankara 06800 Turkey
5. The Center for Solar Energy Research and Applications (GUNAM), Middle East Technical University; Ankara 06800 Turkey
6. Micro and Nanotechnology Program, Middle East Technical University; Ankara 06800 Turkey