1. Department of Materials Science and Engineering and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, USA
2. Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla/Orhanli, 34956 Istanbul, Turkey
3. Department of Materials Science and Engineering and Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA
4. United Technologies Research Center, East Hartford, Connecticut 06118 USA
5. Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA