1. Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
2. Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Paul Scherrer Institute, 5232 Villigen, Switzerland
4. Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
5. Division of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
6. Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States