Dipole moment of a modified poly(3-alkylthiophene) at the air water interface

In experiment,Maxwell ’s displacement current flew through the structure
containing a metal electrode,an air-gap insulating layer and a Langmuir
monolayer situated on the water surface.This contactless arrangement
provided a direct insight in the orientational motion of the monolayer
constituting molecules.The effect of the surface pressure upon the
molecular conformation was monitored by evaluating the vertical component
of the dipole moment.The results were compared to and justified by the
molecular dynamics calculation.These measurements and simulations were
applied to a modified poly (3-alkyl-thiophene )having the polar metoxy
chain ends.