1. Bilkent University, Department of Electrical and Electronics Engineering, Ankara 06800, TurkeybBilkent University, National Nanotechnology Research Center, Ankara 06800, Turkey
2. Bilkent University, National Nanotechnology Research Center, Ankara 06800, TurkeycBilkent University, Institute of Material Science and Nanotechnology, Ankara 06800, Turkey
3. Bilkent University, Department of Electrical and Electronics Engineering, Ankara 06800, TurkeybBilkent University, National Nanotechnology Research Center, Ankara 06800, TurkeycBilkent University, Institute of Material Science and Nanotechnology, Ankara 0