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