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Effect of dipolar moments in domain sizes of lipid bilayers and monolayers
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View: Figures


Image of FIG. 1.
FIG. 1.

An asymmetric bilayer with a domain with a dipole density.

Image of FIG. 2.
FIG. 2.

Two domains of uniform and opposite charges in contact with (A) one side with a salty solution, a medium in between, and a different medium in the outside, (B) both sides in contact with a salty solution and a medium in between, and (C) submerged in a salty solution.

Image of FIG. 3.
FIG. 3.

A Langmuir monolayer with a domain with a finite dipole density. The monolayer head group is represented as a medium with dielectric constant within two opposite charge planes with uniform surface charges, one side in contact with an aqueous solution and the other with a medium of dielectric constant (the hydrocarbon tail).

Image of FIG. 4.
FIG. 4.

Dipolar domains in a bilayer. In a first approximation, the two leaflets of the bilayer are modeled as two monolayers, an inner leaflet monolayer with dipolar density , and an outer leaflet monolayer with , following the same steps as in Fig. 3. At longer distances, the net dipolar moment of the two monolayers can be represented as if were originated by two oppositely charged disks with charge density , with an effective dielectric constant taking into account both hydrocarbon tail and head groups polarizabilities.

Image of FIG. 5.
FIG. 5.

Schematic representation of the different systems studied upon variations in ionic strength.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of dipolar moments in domain sizes of lipid bilayers and monolayers