We have studied the H-bonded dynamics in highly oriented lamellar DOTAP-DOPC model membranes as a function of the DOPC/(DOPC + DOTAP) ratio Φ, by elastic incoherent neutron scattering in the 100 ps time domain on the spectrometer IN13 at ILL. Motions in the in-plane and out-of plane directions have been explored by orienting the momentum transfer predominantly parallel and normal to the surface of highly oriented multilayers, respectively. Increasing the neutral lipid (DOPC) concentration from Φ = 0.5-0.8 we reveal a reduction of the dynamics along the direction normal to the membrane and an unchanged dynamics on the membrane plane.
Dynamical properties of oriented lipid membranes studied by elastic incoherent neutron scattering / Carlo, Castellano; Francesca, Natali; Pozzi, Daniela; Caracciolo, Giulio; Agostina, Congiu. - In: PHYSICA. B, CONDENSED MATTER. - ISSN 0921-4526. - 350:(2004), pp. e955-e958. (Intervento presentato al convegno Third European Conference on Neutron Scattering tenutosi a Montpellier, France nel 03-06/09/2004) [10.1016/j.physb.2004.03.266].
Dynamical properties of oriented lipid membranes studied by elastic incoherent neutron scattering
POZZI, DANIELA;CARACCIOLO, Giulio;
2004
Abstract
We have studied the H-bonded dynamics in highly oriented lamellar DOTAP-DOPC model membranes as a function of the DOPC/(DOPC + DOTAP) ratio Φ, by elastic incoherent neutron scattering in the 100 ps time domain on the spectrometer IN13 at ILL. Motions in the in-plane and out-of plane directions have been explored by orienting the momentum transfer predominantly parallel and normal to the surface of highly oriented multilayers, respectively. Increasing the neutral lipid (DOPC) concentration from Φ = 0.5-0.8 we reveal a reduction of the dynamics along the direction normal to the membrane and an unchanged dynamics on the membrane plane.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
