1. Department of Physics, Montana State University, Bozeman, Montana 59717, National Institute of Chemical Physics and Biophysics, Tallinn, EE 12618, Estonia, Sensopath Technologies, Inc., Bozeman, Montana 59715, Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, and MPA Technologies, Inc., Bozeman, Montana 59715