Journal Article

FZJ-2021-02651

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of NaCl on the Structure and Dynamics of Phospholipid Layers

Jaksch, S. (Corresponding author)FZJ* ; Holderer, O.FZJ* ; Frielinghaus, H.FZJ* ; Koutsioubas, A. ; Zolnierczuk, P.FZJ* ; Hayward, D. W.FZJ* ; Förster, S.FZJ* ; Müller-Buschbaum, P.

2021
Frontiers Media Lausanne

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Please use a persistent id in citations: http://hdl.handle.net/2128/28021  doi:10.3389/fphy.2021.628219

Abstract: 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.

Keyword(s): Health and Life (1st) ; Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Neutronenstreuung (JCNS-1)
3. Heinz Maier-Leibnitz Zentrum (MLZ)
4. JCNS-4 (JCNS-4)
5. JCNS-SNS (JCNS-SNS)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. MARIA: Magnetic reflectometer with high incident angle (NL5N)
2. SNS-NSE: Neutron Spin Echo Spectrometer

Appears in the scientific report 2021

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Database coverage:
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