Abstract
The influence of the charge separation during the trans-cis conformational change between the surface azobenzene 6Az5PVA monolayer on polyimide Langmuir–Blodgett film on the surface charge density is investigated, using the Maxwell displacement current technique. It is theoretically shown, in the framework of the molecular model, which takes into account interactions between the surface polarization (in the quadrupole approximation) and surface electric field, that the experimentally observed changes of the surface charge density in ∼3×10−4 C/m2, caused by the charge separation in ∼2 pC, taking place during the conformational change, may lead to changing of the surface alignment of liquid crystalline molecules, such as 4-n-pentyl-4′-cyanobiphenyl (5CB), having contact with that solid substrate.
Published Version
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