Nanoscale rheology at solid-complex fluid interfaces

Abstract Here we present an approach to measure dynamic membrane properties of phospholipid membranes close to an interface. As an example we show results of the membrane dynamics of a phospholipid membrane multilayer-stack on a solid substrate (silicon). On this sample we were able to measure local...

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Autores principales:	Sebastian Jaksch, Olaf Holderer, Manuchar Gvaramia, Michael Ohl, Michael Monkenbusch, Henrich Frielinghaus
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/30c5082216fc4b2187332b10697a2ef9
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spelling	oai:doaj.org-article:30c5082216fc4b2187332b10697a2ef92021-12-02T15:04:53ZNanoscale rheology at solid-complex fluid interfaces10.1038/s41598-017-04294-42045-2322https://doaj.org/article/30c5082216fc4b2187332b10697a2ef92017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04294-4https://doaj.org/toc/2045-2322Abstract Here we present an approach to measure dynamic membrane properties of phospholipid membranes close to an interface. As an example we show results of the membrane dynamics of a phospholipid membrane multilayer-stack on a solid substrate (silicon). On this sample we were able to measure local interaction and friction parameters using Grazing Incidence Neutron Spin Echo Spectroscopy (GINSES), where an evanescent neutron wave probes the fluctuations close to a rigid interface. With this method it is possible to access length scales in the nano to micrometer region as well as energies in the μeV range. Using a new neutron resonator structure we achieved the required intensity gain for this experiment. During our investigations we found an excitation mode of the phospholipid membrane that has not been reported previously and only became visible using the new methodology. We speculate that the energy transported by that undulation can also serve to distribute energy over a larger area of the membrane, stabilizing it. This new methodology has the capability to probe the viscoelastic effects of biological membranes, becoming a new tool for tribology on the nanoscale and has allowed the observation of the hitherto invisible property of phospholipid membranes using neutrons.Sebastian JakschOlaf HoldererManuchar GvaramiaMichael OhlMichael MonkenbuschHenrich FrielinghausNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sebastian Jaksch Olaf Holderer Manuchar Gvaramia Michael Ohl Michael Monkenbusch Henrich Frielinghaus Nanoscale rheology at solid-complex fluid interfaces
description	Abstract Here we present an approach to measure dynamic membrane properties of phospholipid membranes close to an interface. As an example we show results of the membrane dynamics of a phospholipid membrane multilayer-stack on a solid substrate (silicon). On this sample we were able to measure local interaction and friction parameters using Grazing Incidence Neutron Spin Echo Spectroscopy (GINSES), where an evanescent neutron wave probes the fluctuations close to a rigid interface. With this method it is possible to access length scales in the nano to micrometer region as well as energies in the μeV range. Using a new neutron resonator structure we achieved the required intensity gain for this experiment. During our investigations we found an excitation mode of the phospholipid membrane that has not been reported previously and only became visible using the new methodology. We speculate that the energy transported by that undulation can also serve to distribute energy over a larger area of the membrane, stabilizing it. This new methodology has the capability to probe the viscoelastic effects of biological membranes, becoming a new tool for tribology on the nanoscale and has allowed the observation of the hitherto invisible property of phospholipid membranes using neutrons.
format	article
author	Sebastian Jaksch Olaf Holderer Manuchar Gvaramia Michael Ohl Michael Monkenbusch Henrich Frielinghaus
author_facet	Sebastian Jaksch Olaf Holderer Manuchar Gvaramia Michael Ohl Michael Monkenbusch Henrich Frielinghaus
author_sort	Sebastian Jaksch
title	Nanoscale rheology at solid-complex fluid interfaces
title_short	Nanoscale rheology at solid-complex fluid interfaces
title_full	Nanoscale rheology at solid-complex fluid interfaces
title_fullStr	Nanoscale rheology at solid-complex fluid interfaces
title_full_unstemmed	Nanoscale rheology at solid-complex fluid interfaces
title_sort	nanoscale rheology at solid-complex fluid interfaces
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/30c5082216fc4b2187332b10697a2ef9
work_keys_str_mv	AT sebastianjaksch nanoscalerheologyatsolidcomplexfluidinterfaces AT olafholderer nanoscalerheologyatsolidcomplexfluidinterfaces AT manuchargvaramia nanoscalerheologyatsolidcomplexfluidinterfaces AT michaelohl nanoscalerheologyatsolidcomplexfluidinterfaces AT michaelmonkenbusch nanoscalerheologyatsolidcomplexfluidinterfaces AT henrichfrielinghaus nanoscalerheologyatsolidcomplexfluidinterfaces
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Nanoscale rheology at solid-complex fluid interfaces

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