1. Department of Materials Science & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
2. A.J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, Pennsylvania 19104, United States
3. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, United States
4. Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
5. Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, United States