1. Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute, Technion−Israel Institute of Technology, Haifa 32000, Israel
2. Luminous Center of Excellence for Semiconductor Lighting and Displays, TPI, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, School of Materials Science and Engineering, Nanyang Technological University−NTU Singapore, 639798 Singapore
3. Department of Electrical and Electronics Engineering, Department of Physics, UNAM−Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey