1. Faculty of Engineering and Natural Sciences, Sabanci University, Center of Excellence for Functional Surfaces and Interfaces, Tuzla, Istanbul, Turkey
2. Department of Physics and Astronomy, University of Arkansas at Little Rock, Arkansas, USA, and Department of Physics, College of Science, University of Duhok, Duhok, Kurdistan Region, Iraq
3. Department of Physics and Astronomy, University of Arkansas at Little Rock, Arkansas, USA