1. Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
2. Department
of Chemistry and Biochemistry, Eastern Washington University, Cheney, Washington 99004, United States
3. Division of Materials Research, National Science Foundation, Arlington, Virginia 22230, United States
4. Materials
Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
5. Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, Texas 77204, United States
6. Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, United States