The role of the electrostatic energy of molecular dipoles in the formation of polar LB films

in the paper a thesis is developed about the destructive function of free energy of the electrical double layer field from oriented molecular dipoles in monomolecular layers of surface-active substances during the formation of polar LB films. The change of the electrostatic energy of monomolecular layer of dipoles during the transfer of the monolayer from the water surface to the substrate is considered. A comparison is made between the electrostatic energy of the transferring monolayer and the energy of monolayer adhesion between hydrophobic radicals in the LB film structure. A model is proposed for estimating the maximal polarization, obtained without any special measures preventing the disintegration of the polar state. Some physical-chemical approaches for fixing the LB film polar state are discussed. (C) 2002 Elsevier Science B.V. All rights reserved.