1. Department of Elementary Science, Faculty of Education, Ataturk University, Erzurum, Turkey
2. Advanced Materials Research Laboratory, Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Sciences, Ataturk University, Erzurum, Turkey
3. Department of Physics, Faculty of Science, Ataturk University, Erzurum, Turkey
4. Department of Physics, Faculty of Science, Erzincan University, Erzincan, Turkey
5. Department of Electrical and Electronics Engineering, Faculty of Technology, Dumlupinar University, Simav, Kütahya, Turkey