title: A new formalism for the evaluation of order-fluctuation modes in liquid crystals from field-cycling NMR-relaxometry data.
abstract: A numerical procedure is presented which permits one to derive a formal distribution of collective fluctuation modes from experimental field-cycling NMR-relaxometry data of an ordered system. The purpose is to distinguish true order-fluctuation modes from local reorientation mechanisms. The evaluation scheme is demonstrated using simulated as well as experimental data. Applications serving the elucidation and characterization of modified or limited director fluctuation modes as they occur with liquid crystals in pores or with lyotropic systems are discussed. Test experiments have been carried out with a potassium laurate system.
authors.affiliation: Sektion Kernresonanzspektroskopie, Universität Ulm, Ulm, 89069, Germany. farida.grinberg@physik.uni-ulm.de
authors.forename: F
authors.initials: F
authors.lastname: Grinberg
authors.forename: R
authors.initials: R
authors.lastname: Kimmich
authors.forename: R
authors.initials: R
authors.lastname: Seitter
authors.forename: D
authors.initials: D
authors.lastname: Pusiol
mesh_terms: D003460:Crystallization; D005233:Fatty Alcohols / Q000737:chemistry*; D007850:Lauric Acids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008280:Magnetics; D008961:Models, Structural
chemical_list: D005233:Fatty Alcohols; D007850:Lauric Acids; C030358:lauric acid; C029383:n-decyl alcohol