TY  - JOUR
AU  - Jaksch, Sebastian
AU  - Holderer, Olaf
AU  - Frielinghaus, Henrich
AU  - Koutsioubas, Alexandros
AU  - Zolnierczuk, Piotr
AU  - Hayward, Dominic William
AU  - Förster, Stephan
AU  - Müller-Buschbaum, Peter
TI  - Influence of NaCl on the Structure and Dynamics of Phospholipid Layers
JO  - Frontiers in physics
VL  - 9
SN  - 2296-424X
CY  - Lausanne
PB  - Frontiers Media
M1  - FZJ-2021-02651
SP  - 628219
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000655503600001
DO  - DOI:10.3389/fphy.2021.628219
UR  - https://juser.fz-juelich.de/record/893252
ER  -