1. Marmara University, Dept. of Physics, 34722, Göztepe, Istanbul, Turkey
2. Gebze Technical University, Dept. of Physics, 41400, Çayırova, Kocaeli, Turkey
3. Yildiz Technical University, Dept. of Physics, 34220, Esenler, Istanbul, Turkey
4. Sakarya University, Dept. of Nanoscience and Nanoengineering, 54187, Serdivan, Sakarya, Turkey