Unexpected stability of phospholipid langmuir monolayers deposited on triton X-100 aqueous solutions - Archive ouverte HAL
Article Dans Une Revue Langmuir Année : 2007

Unexpected stability of phospholipid langmuir monolayers deposited on triton X-100 aqueous solutions

Philippe Fontaine
François Muller
  • Fonction : Auteur
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Mathieu Poujade
  • Fonction : Auteur
François Rieutord
Michel Goldmann

Résumé

We studied at the molecular level the interaction between neutral detergent Triton X-100 aqueous solution and a phospholipid Langmuir monolayer deposited on top using surface pressure measurement and grazing incidence X-ray diffraction (GIXD). Macroscopically, the detergent-phospholipid system follows the Gibbs law. However, GIXD shows that the detergent and the phospholipid segregate at the interface. The molecular organization of pure phospholipid domains is imposed by the detergent through surface pressure. Compression and expansion of the surface monolayer system in its final state reveal the stability of the phospholipids domains against dissolution by the detergent in the subphase, even above the detergent cmc. This resistance to dissolution is suppressed by an expansion of the monolayer.

Dates et versions

hal-01292977 , version 1 (24-03-2016)

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Citer

Philippe Fontaine, Marie Claude Faure, François Muller, Mathieu Poujade, Jean-Sébastien Micha, et al.. Unexpected stability of phospholipid langmuir monolayers deposited on triton X-100 aqueous solutions. Langmuir, 2007, 23 (26), pp.12959-12965. ⟨10.1021/la701293n⟩. ⟨hal-01292977⟩
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