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Soft Matter and Biological Physics

Eur. Phys. J. E 1, 87-91

Chain length dependence of anomalous swelling in multilamellar lipid vesicles

S.S. Korreman - D. Posselt

Department of Mathematics and Physics (IMFUFA), Roskilde University, P.O. box 260, 4000 Roskilde, Denmark
stine@ruc.dk, dorthe@ruc.dk

Received 13 January 1999 and Received in final form 6 September 1999

Using small-angle X-ray scattering, the repeat distance vs. temperature is measured for a homologous series of multilamellar vesicles of lecithins with varying acyl chain length in excess water condition around the lipid main transition. A systematic chain length dependence is found which is in accordance with a bending rigidity renormalization and critical unbinding of the lamellae close to the transition, as previously suggested in Hønger et al. [Phys. Rev. Lett. 72, 3911 (1994)].

87.16.-b Subcellular structure and processes - 64.70.Md Transitions in liquid crystals - 61.10.Eq X-ray scattering (including small-angle scattering)

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