Ym. Zhu et al., LIQUID-CRYSTAL ALIGNMENT ON POLYIMIDE LANGMUIR-BLODGETT-FILMS PREPARED ON A NEWLY DESIGNED LANGMUIR TROUGH USING A FLOWING SUBPHASE, Applied physics letters, 63(25), 1993, pp. 3432-3433
Nematic and smectic liquid crystals are homogeneously aligned on polyi
mide Langmuir-Blodgett films prepared by horizontal lifting on a novel
Langmuir trough using a flowing subphase. Atomic force microscopy obs
ervation of the polymer monolayer deposited on graphite reveals that t
he polymer chains are elongated and aligned in the flow direction. Thu
s the alignment may act through the orientation of polyimide molecules
.