Influence of interaction energy in fluid-fluid phase transitions on Langmuir monolayers

Abstract

A pure lattice model for Langmuir monolayers is presented where only nearest neighbor interactions are considered. The flexibility of hydrophobic tails laying on the surface is taken into account but the segments above the surface are taken as upstanding rigid rods without contribution to the entropy. The numerical calculations show that to obtain more than one phase transition the flexibility of these tails has to be taken into account.

Finsler geometrization of classic theory for fields on the interphase boundary including monomolecular 2D-system

“…The nano-structures, which are formed at the boundary which separates two distinct phases, may exhibit unique electro-physical and optical properties [1,2,3,4]. A type of such structures is represented by the Langmuir-Blodgett (LB) monolayers, which are obtained by compressing a mono-molecular layer (monolayer) of amphiphilic molecules on the surface of a liquid subphase [5,6,7,8], in case that the compression is accompanied by the first order phase transition [9,10,11,12]. In [13,14] a Finsler geometrization of the contribution of the electro-capillary interactions to an action S, which describes the motion of particles in the monolayer, was proposed.…”