%0 Journal Article
%A Jaksch, Sebastian
%A Holderer, Olaf
%A Frielinghaus, Henrich
%A Koutsioubas, Alexandros
%A Zolnierczuk, Piotr
%A Hayward, Dominic William
%A Förster, Stephan
%A Müller-Buschbaum, Peter
%T Influence of NaCl on the Structure and Dynamics of Phospholipid Layers
%J Frontiers in physics
%V 9
%@ 2296-424X
%C Lausanne
%I Frontiers Media
%M FZJ-2021-02651
%P 628219
%D 2021
%X We present a structural and dynamical analysis of the influence of NaCl on multilayer stacks of phospholipids on a solid surface. To this end, multilayer stacks of phospholipids (L-α-phosphatidylcholine, abbreviated as SoyPC) are investigated with neutron reflectometry, grazing-incidence small-angle neutron scattering (GISANS) and grazing-incidence neutron-spin echo spectroscopy (GINSES). We show both that the NaCl influence on the structure is predominantly on water-head group interface and also, that the change in dynamics is restricted to an associated change in the inter-plane viscosity. Using this knowledge, it is possible to model the dynamical behavior of a phospholipid membrane in response to a salt concentration of the solvent using only a single parameter, namely the in-plane viscosity. The excellent agreement with our previously published model also strongly supports the existence of a thermally excited surface mode in phospholipid membranes for close-to-physiological conditions.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000655503600001
%R 10.3389/fphy.2021.628219
%U https://juser.fz-juelich.de/record/893252