1. Department of Chemistry and Texas Materials Institute The University of Texas at Austin 2506 Speedway, Stop A5300 Austin TX 78712-1224, U.S.A.
2. Department of Physics Manhattan College Riverdale NY 10471 USA
3. Department of Materials Science and Chemical Engineering Stony Brook University Stony Brook NY 11794 USA
4. Division of Chemistry Brookhaven National Laboratory Upton NY 11973 USA