Calculation of the dielectric constant of monolayer films with dielectric anisotropy

Abstract

¯ 5(a i1a’)/2, in the first-order approximation. In the small molecular area A,)A0/2, the molecules turn out to be uniaxial with an apparent dipole moment m cosu D in the direction of the molecular long axis. The polarity of the additional relative dielectric constant produced by the coupling between the orientational distribution and the dielectric anisotropy of molecules is negative in the mean-field approximation, whereas it is positive in the case in which the molecular area is close to the critical area A0 . @S0163-1829~97!04815-7#