1. UNAM—National Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey
2. NANOTAM—Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey
3. Department of Chemistry, Middle East Technical University, Ankara, 06800, Turkey
4. Department of Engineering Physics, Faculty of Engineering, Ankara University, Beşevler, 06100, Ankara, Turkey
5. Department of Physics Engineering, Hacettepe University, 06800 Beytepe, Ankara, Turkey
6. Department of Electrical and Electronics Engineering, Bilkent University, 06800 Ankara, Turkey
7. Department of Physics, Faculty of Science, Bilkent University, 06800 Ankara, Turkey
8. Department of Chemistry, Faculty of Science, Bilkent University, 06800 Ankara, Turkey