1. R. P. Andres, W. Mahoney, R. G. Osifchin, School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA.
2. T. Bein, S. Feng, J. I. Henderson, C. P. Kubiak, Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA.
3. M. Dorogi and R. Reifenberger, Department of Physics, Purdue University, West Lafayette, IN 47907, USA.