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000863827 1001_ $$0P:(DE-Juel1)157910$$aJaksch, Sebastian$$b0$$eCorresponding author$$ufzj
000863827 245__ $$aLong-Range Excitations in Phospholipid Membranes
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000863827 520__ $$aWe investigated the existence of long-range excitations and correlated structures in phospholipid membranes by means of grazing-incidence neutron spin echo spectroscopy, grazing-incidence small-angle neutron scattering, and corresponding theoretical calculations inspired by smectic-membrane theory. All these methods confirmed the existence of thermal excitations in the plane of the surface of the phospholipid membranes or the corresponding structures, respectively. Also, these measurements revealed a temperature dependence of these excitations. These excitations are associated with 100 nm in-plane correlations around physiological temperatures and of 75 nm at 16∘C. A single excitation has an energy around the μeV-regime. A temperature series revealed a high abundance at physiological temperatures and pronounced long-range in-plane structures, which are strongly suppressed at temperatures below 20∘C. From the length-scales and energy transfers involved we surmise that these excitations may play a role in several functions of the cell membranes such as stability and energy dissipation along the membrane. From a fundamental point of view, the observed behavior of those excitations is congruent with that of a quasi-particle (surface mode phonon, smomon) that exists in the plane of phospholipid membranes.
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000863827 7001_ $$0P:(DE-HGF)0$$aKoutsioubas, Alexandros$$b1
000863827 7001_ $$0P:(DE-Juel1)130821$$aMattauch, Stefan$$b2$$ufzj
000863827 7001_ $$0P:(DE-Juel1)130718$$aHolderer, Olaf$$b3$$ufzj
000863827 7001_ $$0P:(DE-Juel1)130646$$aFrielinghaus, Henrich$$b4$$ufzj
000863827 773__ $$0PERI:(DE-600)1496839-3$$a10.1016/j.chemphyslip.2019.104788$$gp. S0009308419300799$$p104788$$tChemistry and physics of lipids$$v225$$x0009-3084$$y2019
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