Transverse THz dynamics of phospholipid membranes: a neutron scattering study

Valeria Conti Nibali, Ulderico Wanderlingh, Giovanna D'Angelo, Caterina Branca, Alessio De Francesco, Caterina Petrillo, Alessandro Paciaroni, Francesco Sacchetti

Abstract


The off-plane dynamics in the frequency window from 1 THz (4 meV) to 3 THz (12 meV) in multiple phospholipid bilayers as studied by means of neutron scattering is presented. A weak inelastic signal is observed, indicating that off-plane dynamics is dominated by the disordered inter-layer water. A collective mode is detected which shows a low-momentum dispersion similar to that of bulk water, while a more complex dynamics is found on increasing the momentum transfer.

Keywords


collective dynamics; lipid bilayer; neutron scattering

Full Text:

PDF


DOI: https://doi.org/10.1478/AAPP.98S1A9

Copyright (c) 2020 Valeria Conti Nibali, Ulderico Wanderlingh, Giovanna D'Angelo, Caterina Branca, Alessio De Francesco, Caterina Petrillo, Alessandro Paciaroni, Francesco Sacchetti

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.