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À propos de : Reversible Stepwise Formation of Mono- and Bilayers of aFluorocarbon/Hydrocarbon Diblock on Top of aPhospholipid Langmuir Monolayer. A Case of VerticalPhase Separation        

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  • Reversible Stepwise Formation of Mono- and Bilayers of aFluorocarbon/Hydrocarbon Diblock on Top of aPhospholipid Langmuir Monolayer. A Case of VerticalPhase Separation
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  • Compression of mixed Langmuir monolayers made from combinations of dipalmitoyl phosphatidylethanolamine (DPPE) and the semi-fluorinated alkane C8F17C16H33 (F8H16) results in expulsion of thediblock molecule at high pressure. Depending on the DPPE/F8H16 molar ratio, either a monolayer or abilayer of F8H16 is formed on top of a DPPE-only monolayer. The structure of the hydrocarbon andfluorocarbon layers that constitute the resulting vertically separated bi- or trilayer was determined usinggrazing incidence X-ray diffraction. The phenomenon is reversible and represents a novel case of vertical,pressure-induced phase separation.
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