1. Department of Chemical Engineering, University of NebraskaLincoln, Nebraska 68588-0126, Department of Chemistry, University of NebraskaLincoln, Nebraska 68588-0304, Chemical Science & Technology Division, CST-DO, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, and The Nanotechnology Laboratory (NanoteK), Research & Development, Kraft Foods Inc., 801 Waukegan Rd. Glenview, Illinois 60025