Anomalous swelling of multilamellar lipid bilayers in the transition region by renormalization of curvature elasticity

Thomas Hønger, Kell Mortensen, John Hjort Ipsen, Jesper Lemmich, Rogert Bauer, and Ole G. Mouritsen
Phys. Rev. Lett. 72, 3911 – Published 13 June 1994
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Abstract

Small-angle neutron scattering is used to determine the temperature dependence of the lamellar repeat distance in an aqueous multilamellar solution of phospholipid bilayers. A thermal anomaly in the swelling behavior is observed at the bilayer phase transition. The anomalous behavior can be suppressed by varying the lipid acyl-chain length or by alloying with a molecular stiffening agent. The experimental results are explained in terms of renormalization of the bilayer curvature elasticity and by using a theory of repulsive interlamellar undulation forces.

  • Received 8 September 1993

DOI:https://doi.org/10.1103/PhysRevLett.72.3911

©1994 American Physical Society

Authors & Affiliations

Thomas Hønger, Kell Mortensen, John Hjort Ipsen, Jesper Lemmich, Rogert Bauer, and Ole G. Mouritsen

  • Department of Physical Chemistry, The Technical University of Denmark, Building 206, DK-2800 Lyngby, Denmark
  • Department of Solid State Physics, Riso/ National Laboratory, DK-4000 Roskilde, Denmark
  • Department of Physics, Royal Danish School of Agriculture and Veterinary Sciences, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark

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Issue

Vol. 72, Iss. 24 — 13 June 1994

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