1. Department of Materials Science and Engineering, Faculty of Engineering, Eskisehir Technical University, Eskisehir 26555, Turkey
2. Department of Physics, Faculty of Science, Eskisehir Technical University, Eskisehir 26470, Turkey
3. Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
4. Department of Nanotechnology Engineering, Faculty of Engineering, Abdullah Gul University, Kayseri 38080, Turkey
5. Advanced Technologies Application and Research Center, Eskisehir Technical University, Eskisehir 26555, Turkey