Influence of NaCl on the Structure and Dynamics of Phospholipid Layers

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.

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Grazing Incidence Neutron Spin Echo Study of Poly(N-isopropylacrylamide) Brushes

Macromolecules ◽

10.1021/acs.macromol.9b01247 ◽

2020 ◽

Vol 53 (5) ◽

pp. 1819-1830 ◽

Cited By ~ 3

Author(s):

Judith Witte ◽

Patrick Krause ◽

Tetyana Kyrey ◽

Anna Margarethe Dahl ◽

Jana Lutzki ◽

...

Keyword(s):

Spin Echo ◽

Grazing Incidence ◽

Neutron Spin ◽

Neutron Spin Echo

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Phospholipid membrane dynamics at the solid–liquid interface studied with grazing incidence neutron spin echo spectroscopy

Journal of Physics Conference Series ◽

10.1088/1742-6596/1316/1/012001 ◽

2019 ◽

Vol 1316 ◽

pp. 012001

Author(s):

Olaf Holderer ◽

Sebastian Jaksch ◽

Piotr Zolnierczuk ◽

Michael Ohl ◽

Henrich Frielinghaus

Keyword(s):

Spin Echo ◽

Grazing Incidence ◽

Membrane Dynamics ◽

Liquid Interface ◽

Neutron Spin ◽

Phospholipid Membrane ◽

Neutron Spin Echo ◽

Solid Liquid Interface ◽

Solid Liquid

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Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

Journal of Visualized Experiments ◽

10.3791/51129 ◽

2014 ◽

Author(s):

Andrew J. Parnell ◽

Adam Hobson ◽

Robert M. Dalgliesh ◽

Richard A. L. Jones ◽

Alan D. F. Dunbar

Keyword(s):

Solar Cell ◽

Organic Solar Cell ◽

Spin Echo ◽

Grazing Incidence ◽

Neutron Spin ◽

Neutron Spin Echo

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Grazing incidence neutron spin echo spectroscopy: instrumentation aspects and scientific opportunities

Journal of Physics Conference Series ◽

10.1088/1742-6596/528/1/012025 ◽

2014 ◽

Vol 528 ◽

pp. 012025 ◽

Cited By ~ 3

Author(s):

O Holderer ◽

H Frielinghaus ◽

S Wellert ◽

F Lipfert ◽

M Monkenbusch ◽

...

Keyword(s):

Spin Echo ◽

Grazing Incidence ◽

Neutron Spin ◽

Neutron Spin Echo ◽

Spectroscopy Instrumentation

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A grazing incidence neutron spin echo study of near surface dynamics in p(MEO2MA-co-OEGMA) copolymer brushes

Colloid & Polymer Science ◽

10.1007/s00396-018-4421-9 ◽

2018 ◽

Vol 296 (12) ◽

pp. 2005-2014 ◽

Cited By ~ 3

Author(s):

Stefan Wellert ◽

Jessica Hübner ◽

Dikran Boyaciyan ◽

Oxana Ivanova ◽

Regine von Klitzing ◽

...

Keyword(s):

Spin Echo ◽

Grazing Incidence ◽

Neutron Spin ◽

Surface Dynamics ◽

Near Surface ◽

Neutron Spin Echo ◽

Copolymer Brushes

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Comparison of dynamical theory and phase-object approximation for neutron scattering from periodic structures

Journal of Applied Crystallography ◽

10.1107/s0021889811032730 ◽

2011 ◽

Vol 44 (5) ◽

pp. 958-965 ◽

Cited By ~ 3

Author(s):

Rana Ashkar ◽

V. O. de Haan ◽

A. A. van Well ◽

R. Dalgliesh ◽

J. Plomp ◽

...

Keyword(s):

Neutron Scattering ◽

Periodic Structures ◽

Good Description ◽

Spin Echo ◽

Diffraction Gratings ◽

Grazing Incidence ◽

Dynamical Theory ◽

Neutron Spin ◽

Phase Object ◽

Neutron Spin Echo

Dynamical theory (DT) calculations have been successfully developed to explain neutron spin-echo resolved grazing-incidence scattering from diffraction gratings. The theory, without any adjustable parameters, has been shown in previous publications to accurately reproduce the sensitivity of the spin-echo polarization signal to sample specifications and scattering geometry. The phase-object approximation (POA), which is computationally less demanding than the DT, has also been used to analyze neutron spin-echo polarization data obtained from diffraction gratings. In this paper, POA and DT calculations are compared for neutron scattering from various diffraction gratings in different geometrical settings. POA gives a good description of the data for transmission cases, where the neutron beam is incident at large angles to the average grating surface. However, for the grazing-incidence reflection cases that were studied, the POA does not fit the data using the independently determined dimensions of the measured gratings. On the other hand, the good agreement between dynamical theory and the data from gratings with known profiles paves the way for its use to extract profile information from periodic samples with unknown structures.

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Understanding near-surface polymer dynamics by a combination of grazing-incidence neutron scattering and virtual experiments

Journal of Applied Crystallography ◽

10.1107/s1600576720014739 ◽

2021 ◽

Vol 54 (1) ◽

Author(s):

Tetyana Kyrey ◽

Marina Ganeva ◽

Judith Witte ◽

Regine von Klitzing ◽

Stefan Wellert ◽

...

Keyword(s):

Data Analysis ◽

Spin Echo ◽

Grazing Incidence ◽

Incidence Geometry ◽

Polymer Dynamics ◽

Neutron Spin ◽

Time Range ◽

Near Surface ◽

Virtual Experiments ◽

Neutron Spin Echo

Neutron spin-echo spectroscopy is a unique experimental method for the investigation of polymer dynamics. The combination of neutron spin-echo spectroscopy with grazing-incidence geometry (GINSES) opens the possibility to probe the dynamics of soft-matter materials in the vicinity of the solid substrate in the time range up to 100 ns. However, the usage of the GINSES technique has some peculiarities and, due to the novelty of the method and complexity of the scattering geometry, difficulties in further data analysis occur. The current work discusses how virtual experiments within the distorted-wave Born approximation using the BornAgain software can improve GINSES data treatment and aid the understanding of polymer dynamics in the vicinity of the solid surface. With two examples, poly(N-isopropyl acrylamide) brushes and poly(ethylene glycol) microgels on Si surfaces, the simulation as well as the application of the simulation to the GINSES data analysis are presented. The approach allowed a deeper insight to be gained of the background effect and scattering contribution of different layers.

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A neutron spin echo resolved grazing incidence scattering study of crystallites in organic photovoltaic thin films

Applied Physics Letters ◽

10.1063/1.4793513 ◽

2013 ◽

Vol 102 (7) ◽

pp. 073111 ◽

Cited By ~ 8

Author(s):

A. J. Parnell ◽

R. M. Dalgliesh ◽

R. A. L. Jones ◽

A. D. F. Dunbar

Keyword(s):

Thin Films ◽

Spin Echo ◽

Grazing Incidence ◽

Organic Photovoltaic ◽

Neutron Spin ◽

Neutron Spin Echo ◽

Scattering Study

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Study on the temperature-dependent coupling among viscosity, conductivity and structural relaxation of ionic liquids

Physical Chemistry Chemical Physics ◽

10.1039/c5cp02335a ◽

2015 ◽

Vol 17 (29) ◽

pp. 19126-19133 ◽

Cited By ~ 13

Author(s):

Tsuyoshi Yamaguchi ◽

Takuya Yonezawa ◽

Shinobu Koda

Keyword(s):

Ionic Liquids ◽

Structural Relaxation ◽

Spin Echo ◽

Neutron Spin ◽

Temperature Dependent ◽

Frequency Dependent ◽

Neutron Spin Echo ◽

Dependent Viscosity

The frequency-dependent viscosity and conductivity of three imidazolium-based ionic liquids were measured at several temperatures in the MHz region, and the results are compared with the intermediate scattering functions determined by neutron spin echo spectroscopy.

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