Dispersion relation of lipid membrane shape fluctuations by neutron spin-echo spectrometry
| dc.creator | Rheinstadter, Maikel C. | |
| dc.creator | Haussler, Wolfgang | |
| dc.creator | Salditt, Tim | |
| dc.date | 2006-06-05 | |
| dc.date.accessioned | 2026-07-07T07:12:28Z | |
| dc.date.available | 2026-07-07T07:12:28Z | |
| dc.description | We have studied the mesoscopic shape fluctuations in aligned multilamellar stacks of DMPC bilayers using the neutron spin-echo technique. The corresponding in plane dispersion relation $τ^{-1}$(q$_{||}$) at different temperatures in the gel (ripple, P$_{β'}$) and the fluid (L$_α$) phase of this model system has been determined. Two relaxation processes, one at about 10ns and a second, slower process at about 100ns can be quantified. The dispersion relation in the fluid phase is fitted to a smectic hydrodynamic theory, with a correction for finite q$_z$ resolution. We extract values for, the bilayer bending rigidity $κ$, the compressional modulus of the stacks $B$, and the effective sliding viscosity $η_3$. The softening of a mode which can be associated with the formation of the ripple structure is observed close to the main phase transition. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0606114 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0606114 | |
| dc.identifier | Phys. Rev. Lett. 97, 048103 (2006) | |
| dc.identifier | doi:10.1103/PhysRevLett.97.048103 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/112087 | |
| dc.subject | Soft Condensed Matter | |
| dc.title | Dispersion relation of lipid membrane shape fluctuations by neutron spin-echo spectrometry | |
| dc.type | text |