1. Department of Physics, Faculty of Science Gazi University Ankara Turkey
2. Central Research Laboratory Application and Research Center Ankara Yıldırım Beyazıt University Ankara Turkey
3. Department of Physics Engineering, Faculty of Engineering Ankara University Ankara Turkey
4. Nanotechnology Research Center Bilkent University Ankara Turkey
5. Department of Physics Bilkent University Ankara Turkey
6. Department of Electrical and Electronics Engineering Bilkent University Ankara Turkey