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Colloids Interfaces 2018, 2(3), 31; https://doi.org/10.3390/colloids2030031

Measurements of Dynamic Contributions to Coherent Neutron Scattering

Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science JCNS at Heinz Maier-Leibnitz Zentrum MLZ, Lichtenberstraße 1, 85747 Garching, Germany
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Received: 13 July 2018 / Revised: 3 August 2018 / Accepted: 3 August 2018 / Published: 7 August 2018
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Abstract

In this manuscript, we are investigating the contribution of dynamic membrane properties of phospholipid membranes to coherent scattering signals under grazing incidence. Spectroscopic measurements under grazing incidence can provide useful insight into the properties of biological membranes; however, they are often impeded by weak signals. By using grazing-incidence small-angle neutron scattering (GISANS) to identify a dynamic scattering contribution, we are able to independently corroborate the existence of a previously found dynamic mode, now measured by grazing-incidence neutron spin echo spectroscopy (GINSES). Additionally, by increasing the speed of measurement compared to GINSES from several days to hours, we were able to explore the temperature behavior of this mode in phospholipid membranes. These dynamic modes of the membranes show a wavelength of around 700 Å in-plane of the membrane and are most pronounced around 37 C and strongly decrease at lower temperatures below 25 C before vanishing at 20 C. We therefore speculate that they may be linked to biologically relevant functions of the membranes themselves. To our knowledge, this is the first report of an investigation of that membrane mode by means of GISANS. View Full-Text
Keywords: phospholipids; membranes; GISANS; GINSES; coherent scattering; spectroscopy phospholipids; membranes; GISANS; GINSES; coherent scattering; spectroscopy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Jaksch, S.; Koutsioubas, A.; Mattauch, S.; Holderer, O.; Frielinghaus, H. Measurements of Dynamic Contributions to Coherent Neutron Scattering. Colloids Interfaces 2018, 2, 31.

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