1. Department of Materials Science and Engineering, Ohio State University, Columbus, Ohio 43210, United States
2. Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara 06800, Turkey
3. Department of Chemistry, Bilkent University, Ankara 06800, Turkey
4. Department of Metallurgical and Materials Engineering, Eskisehir Osmangazi University, Eskisehir 26040, Turkey
5. UNAM—National Nanotechnology Center, Bilkent University, Ankara 06800, Turkey
6. Department of Micro and Nanotechnology, Middle East Technical University, Ankara 06800, Turkey
7. Centre for Solar Energy Research and Applications (GÜNAM), Middle East Technical University, Ankara 06800, Turkey