Effect of the composition and temperature of the subphase on the surface potential of the Langmuir monolayer of 8CB liquid crystal

Abstract

The effect of the composition and temperature of the subphase on the effective dipole moment of the Langmuir monolayers of a liquid crystal 4-n-octyl-4’-cyanobiphenyl on the surface of pure water and an aqueous solution containing copper nanoparticles was studied. It is shown that the presence of nanoparticles in the subphase leads to increase of the area occupied by the monolayer in the condensed state, increase of the collapse pressure, and reduce of the surface potential at the end of monolayer compression. The effective dipole moments of liquid crystal molecules were calculated for monolayers formed under various conditions.

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“…Surface potential (Δ SP ) measurements represent another critical technique for characterizing Langmuir films. 54 The values obtained for the pure PC monolayer align with those reported in the literature. 55 Figure S7 provides insights into the surface potential of the PC monolayer across different LP/PC ratios at a PNG concentration of 15 μmol L –1 .…”

“…Surface potential (Δ SP ) measurements represent another critical technique for characterizing Langmuir films . The values obtained for the pure PC monolayer align with those reported in the literature …”