Article (Scientific journals)
Gaussian model of fluctuating membrane and its scattering properties.
Gommes, Cédric; Dubey, Purushottam S; Stadler, Andreas M et al.
2024In Physical Review. E, 110 (3-1), p. 034608
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Keywords :
Analytical expressions; Elastic and inelastic scattering; Fluctuating membrane; Gaussian modeling; Gaussian random fields; Intermediate scattering functions; Scattering data; Scattering property; Theoretical framework; Time dependent; Statistical and Nonlinear Physics; Statistics and Probability; Condensed Matter Physics
Abstract :
[en] A mathematical model is developed to jointly analyze elastic and inelastic scattering data of fluctuating membranes within a single theoretical framework. The model builds on a nonhomogeneously clipped time-dependent Gaussian random field. This specific approach provides one with general analytical expressions for the intermediate scattering function for any number of sublayers in the membrane and arbitrary contrasts. The model is illustrated with the analysis of small-angle x-ray and neutron scattering as well as with neutron spin-echo data measured on unilamellar vesicles prepared from phospholipids extracted from porcine brain tissues. The parameters fitted on the entire data set are the lengths of the chain and the head of the molecules that make up the membrane, the amplitude and lateral sizes of the bending deformations, the thickness fluctuation, and a single parameter characterizing the dynamics.
Disciplines :
Physics
Biochemistry, biophysics & molecular biology
Author, co-author :
Gommes, Cédric  ;  Université de Liège - ULiège > Department of Chemical Engineering
Dubey, Purushottam S;  Forschungszentrum Jülich GmbH, Jülich Center for Neutron Science at the Heinz Maier Leibnitz Zentrum, Lichtenbergstrasse 1, 85747 Garching, Germany
Stadler, Andreas M ;  Forschungszentrum Jülich GmbH, Jülich Center for Neutron Science, 52425 Jülich, Germany ; Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany
Wu, Baohu ;  Forschungszentrum Jülich GmbH, Jülich Center for Neutron Science at the Heinz Maier Leibnitz Zentrum, Lichtenbergstrasse 1, 85747 Garching, Germany
Czakkel, Orsolya ;  Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, France
Porcar, Lionel;  Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, France
Jaksch, Sebastian ;  Forschungszentrum Jülich GmbH, Jülich Center for Neutron Science at the Heinz Maier Leibnitz Zentrum, Lichtenbergstrasse 1, 85747 Garching, Germany ; European Spallation Source (ESS) ERIC, Partikelgatan 2, 22484 Lund, Sweden
Frielinghaus, Henrich ;  Forschungszentrum Jülich GmbH, Jülich Center for Neutron Science at the Heinz Maier Leibnitz Zentrum, Lichtenbergstrasse 1, 85747 Garching, Germany
Holderer, Olaf ;  Forschungszentrum Jülich GmbH, Jülich Center for Neutron Science at the Heinz Maier Leibnitz Zentrum, Lichtenbergstrasse 1, 85747 Garching, Germany
Language :
English
Title :
Gaussian model of fluctuating membrane and its scattering properties.
Publication date :
September 2024
Journal title :
Physical Review. E
ISSN :
2470-0045
eISSN :
2470-0053
Publisher :
American Physical Society, United States
Volume :
110
Issue :
3-1
Pages :
034608
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique
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