X-ray scattering on a floating membrane : interaction potential and effects of an electric field
type: Dataset
description: We have determined by grazing incidence X-ray scattering the interaction potential between two lipid bilayers, one adsorbed on a solid surface and the other floating close by. We find that interactions in this highly hydrated system are two orders of magnitude softer than in previously reported work on multilayer stacks. This is attributed to the weak electrostatic repulsion due to the small fraction of ionized lipids in defectless supported bilayers. We also access the entropic repulsion potentials, allowing us to discriminate between the different existing models.The effects of an electric field on the properties of membranes have also been studied. We show that the field induces a negative tension and an increase of the rigidity. We also show that it is possible to destabilize a supported bilayer by an electric field under certain conditions.Finally, we measure the properties of charged membranes using X-ray scattering, giving access to the limits of the Poisson-Boltzmann theory.
landing page: https://theses.hal.science/tel-00993900
identifier: NNT: 2013STRAE010
keyword: biophysics
keyword: biophysique
keyword: electrostatics
keyword: electrostatique
keyword: fluctuations-thermiques
keyword: infoeu-reposemanticsdoctoralthesis
keyword: membranes
keyword: physique-statistique
keyword: sdvsalife-sciences-q-bioagricultural-sciences
keyword: statistical-physics
keyword: thermal-fluctuations
keyword: theses
issued: 2026-05-05T10:43:27.836539
modified: 2026-05-05T10:43:27.836545
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

X-ray scattering on a floating membrane : interaction potential and effects of an electric field
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00993900
issued: 2026-05-05T10:43:27.846434
modified: 2026-05-05T10:43:27.813349