ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We report a calculation of the free energy difference between a reference monolayer, in which the amphiphile molecules are vertical and arranged in a hexagonal lattice, and the derivative monolayer, in which the amphiphile molecules are tilted and arranged in a distorted hexagonal lattice. For the case that the interaction between amphiphile molecules, and that between an amphiphile molecule and the surface, are described by a Lennard-Jones interaction per unit length, it is found that a tilted state of the monolayer is stable only if the ratio of the amphiphile chain–surface to amphiphile chain–amphiphile chain interactions exceeds a critical value. When the area per molecule and temperature are the same, a monolayer with molecules tilting toward their nearest neighbors has a larger tilt angle and lower free energy than a monolayer with molecules tilting between the nearest neighbors.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.462614
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