1. ERNAM─Nanotechnology Research and Application Center, Erciyes University, Kayseri 38039, Turkey
2. Department of Materials Science and Engineering, Erciyes University, Kayseri 38039, Turkey
3. Department of Nanotechnology Engineering, Abdullah Gul University, Kayseri 38080, Turkey
4. Department of Electrical and Electronics Engineering, Abdullah Gul University, Kayseri 38080, Turkey
5. UNAM─Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey