1. Department of Chemical Engineering Middle East Technical University Dumlupınar Bulvarı No:1 Çankaya Ankara 06800 Turkey
2. Institute of Materials Science Nanotechnology National Nanotechnology Research Center (UNAM) Bilkent University Ankara 06800 Turkey
3. Faculty of Biochemistry and Molecular Medicine Faculty of Medicine University of Oulu Oulu 90014 Finland
4. Department of Mechanical and Aerospace Engineering Materials Science and Engineering Program University of California, San Diego La Jolla CA 92093 USA