1. Department of Chemistry, Middle East Technical University, 06800, Cankaya, Ankara, Turkey
2. Department of Chemistry, Eskisehir Osmangazi University, 26480 Eskisehir, Turkey
3. Department of Biological Sciences, Middle East Technical University, 06800, Cankaya, Ankara, Turkey
4. Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, 06800, Cankaya, Ankara, Turkey