1. Department of Physics and Astronomy, University of Missouri Kansas City, Kansas City, MO, 64110, USA
2. Department of Physics, Astronomy and Materials Science, Missouri State University, Springfield, MO 65897, USA
3. Buildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
4. Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN, 37996-2100, USA