1. Department of Materials Science and Engineering; Faculty of Engineering, Anadolu University; 26555 Eskisehir Turkey
2. Department of Electrical and Electronics Engineering; Faculty of Engineering, Anadolu University; 26555 Eskisehir Turkey
3. Department of Physics; UNAM Institute of Materials Science and Nanotechnology, Bilkent University; 06800 Ankara Turkey
4. Department of Mechanical Engineering; Faculty of Engineering, Anadolu University; 26555 Eskisehir Turkey