1. Department of Biomedical Science and Engineering, Koç University, Istanbul 34450, Turkey
2. Graduate School of Material Science and Engineering, Koç University, Istanbul 34450, Turkey
3. Institute of Physics, Montanuniversitaet Leoben, Leoben 8700, Austria
4. Department of Electrical and Electronics Engineering, Koç University, Istanbul 34450, Turkey
5. Koç University Surface Science and Technology Center (KUYTAM), Koç University, Istanbul 34450, Turkey
6. Department of Nanotechnology Engineering, Abdullah Gul University, Kayseri 38080, Turkey
7. SUNUM Nanotechnology Research and Application Center, Sabanci University, Istanbul 34956, Turkey
8. Laser Research Laboratory, Departments of Physics and Electrical-Electronics Engineering, Koç University, Istanbul 34450, Turkey
9. Koc University Boron and Advanced Materials Application and Research Center, Koç University, Istanbul 34450, Turkey