Fluctuation dynamics of bilayer vesicles with intermonolayer sliding: Experiment and theory
| العنوان: | Fluctuation dynamics of bilayer vesicles with intermonolayer sliding: Experiment and theory |
|---|---|
| المؤلفون: | Francisco J. Cao, Peter Fouquet, Francisco Monroy, Yvonne Hertle, Thomas Hellweg, Iván López-Montero, Lara H. Moleiro, Michael Mell |
| المصدر: | E-Prints Complutense: Archivo Institucional de la UCM Universidad Complutense de Madrid E-Prints Complutense. Archivo Institucional de la UCM instname |
| بيانات النشر: | Elsevier, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Models, Molecular, Friction, Bending, Lipid Bilayers, Analytical chemistry, Biochemistry, Spectral line, Membrane bending, Quantitative Biology::Subcellular Processes, Lipid bilayer, Molecular Biology, Unilamellar Liposomes, Physics::Biological Physics, Condensed matter physics, Chemistry, Vesicle, Bilayer, Organic Chemistry, Autocorrelation, Membrane, Temperature, Cell Biology, Lipid, Física nuclear, Lipid vesicle, Dimyristoylphosphatidylcholine |
| الوصف: | The presence of coupled modes of membrane motion in closed shells is extensively predicted by theory. The bilayer structure inherent to lipid vesicles is suitable to support hybrid modes of ctirvature motion coupling membrane bending with the local reorganization of the bilayer material through relaxation of the dilatational stresses. Previous experiments evidenced the existence of such hybrid modes facilitating membrane bending at high curvatures in lipid vesicles [Rodriguez-Garcia, R., Arriaga, L.R., Mell, M., Moleiro, L.H., Lopez-Montero, I., Monroy, F., 2009. Phys. Rev. Lett. 102, 1282011. For lipid bilayers that are able to undergo intermonolayer sliding, the experimental fluctuation spectra are found compatible with a bimodal schema. The usual tension/bending fluctuations couple with the hybrid modes in a mechanical interplay, which becomes progressively efficient with increasing vesicle radius, to saturate at infinity radius into the behavior expected for a flat membrane. Grounded on the theory of closed shells, we propose an approximated expression of the bimodal spectrum, which predicts the observed dependencies on the vesicle radius. The dynamical features obtained from the autocorrelation functions of the vesicle fluctuations are found in quantitative agreement with the proposed theory. (C) 2014 Elsevier Ireland Ltd. All rights reserved. |
| وصف الملف: | application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb2e33330183e1ecd6496b429d8ce257 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....fb2e33330183e1ecd6496b429d8ce257 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |