1. Department of Chemistry Temple University Philadelphia, Pennsylvania 19122 USA.
2. Northeastern University Physics Department 360 Huntington Ave. 111 Dana Research Center Boston, MA 02115 USA.
3. Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia, PA 19104 USA.
4. The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta, GA 30332 USA.
5. College of Engineering Temple University Philadelphia, PA 19122 USA
6. Department of Physics School of Engineering Science, LUT University FI-53850 Lappeenranta Finland
7. College of Engineering University of Notre Dame Notre Dame, IN 46556 USA