1. Materials Physics & Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
2. Theoretical
Division, Los Alamos National Laboratory, Los Alamos, New Mexico
87545, United States
3. Department
of Chemistry, Northwestern University,
Evanston, Illinois 60208,
United States
4. Chemistry
Division, Los Alamos National Laboratory, Los Alamos, New Mexico
87545, United States
5. Center for
Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439,
United States