1. Department of Chemistry, Tennessee State University, Nashville, Tennessee 37209, Department of Physics, Xavier University of Louisiana, New Orleans, Louisiana 70125, Laboratoire de Science et Genie Alimentaires, ENSAIA-INPL, Vandoeuvre-Les-Nancy, 54505 France, Universite Libre de Bruxelles, 1050 Bruxelles, Belgium, and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831