1. NANOTAM—Nanotechnology Research CenterBilkent University Ankara 06800 Turkey
2. Department of Electrical and Electronics EngineeringBilkent University Ankara 06800 Turkey
3. UNAM—National Nanotechnology Research CenterInstitute of Materials Science and NanotechnologyBilkent University Ankara 06800 Turkey
4. Department of Energy EngineeringFaculty of EngineeringAnkara University Ankara 06830 Turkey
5. Department of ChemistryFaculty of ScienceBilkent University Ankara 06800 Turkey
6. Department of PhysicsBilkent University Ankara 06800 Turkey