1. Department of Chemistry, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
2. Nanofabrication and Nanocharacterization Centre for Scientific and Technological Advanced Research, Koç University, Istanbul 34450, Turkey
3. Graduate School of Materials Science and Engineering, Koç University, Rumelifeneri Yolu, Istanbul 34450, Turkey
4. KUYTAM, Koç University Surface Science and Technology Center, Koc University, Rumelifeneri Yolu, Istanbul 34450, Turkey
5. Departments of Physics and Electrical-Electronic Engineering, Koç University, Rumelifeneri Yolu, Istanbul 34450, Turkey
6. Department of Metallurgical and Materials Engineering, Istanbul Technical University, Istanbul 34469, Turkey