1. Department of Materials Science and Engineering The Pennsylvania State University University Park PA 16802 USA
2. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA
3. Department of Engineering Science and Mechanics The Pennsylvania State University University Park PA 16802 USA
4. Department of Mathematics The Pennsylvania State University University Park PA 16802 USA
5. Materials Research Institute The Pennsylvania State University University Park PA 16802 USA
6. Department of Physics Pennsylvania State University University Park PA 16802 USA