1. UNAM—National Nanotechnology Research CenterInstitute of Materials Science and NanotechnologyBilkent University 6800 Ankara Turkey
2. Department of Electrical and Electronics EngineeringBilkent University 06800 Ankara Turkey
3. NANOTAM—Nanotechnology Research CenterBilkent University 06800 Ankara Turkey
4. Chemistry DepartmentKoc University Istanbul 34450 Turkey
5. TUPRAS Energy Center (KUTEM)Koc University Istanbul 34450 Turkey
6. Department of ChemistryFaculty of ScienceBilkent University 06800 Ankara Turkey
7. Department of PhysicsFaculty of ScienceBilkent University 06800 Ankara Turkey