Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali (Oct 2020)

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

DOI
https://doi.org/10.1478/AAPP.98S1A9
Journal volume & issue
Vol. 98, no. S1
p. A9

Abstract

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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.