Effects of Nematic Compounds with High Clearing Points on the Multiplexing Performance of Twisted Nematic Displays

Surface Plasmon Raman Scattering Studies of Liquid Crystal Anchoring on Liquid-Crystal-Based Self-Assembled Monolayers

“…The positive surface potential of the SAM of 3 suggests that the −CN dipole only has a small contribution to the surface potential; that is, the data constant with the molecular orientation found from the RAIRS data. The dielectric constant perpendicular to the axis of 3 is estimated to be 5.6 on the basis of data for LC molecules of a similar structure . Applying a packing density of 2.5 × 10 18 molecules/m 2 (on the basis of data obtain in reference) would give the normal component of the net dipole moment of 3 to be ∼1.5 D; that is, much lower than both 1 and 2 and consistent with the net dipole moment orientation being close to parallel to the plane of the surface.…”

“…By making the assumption that the headgroup contribution should be the same for all alkanethiol SAMs, an estimate for the net “normal component” of the dipole moment can be made for SAMs of 1 and 2 . We estimate the dielectric constant of 1 and 2 along the axis to be 12.5 and 15.0, respectively, on the basis of the quoted dielectric constant along the axis of LC molecules of similar biphenyl and terphenyl structures. , The molecular packing density of SAMs of 1 and 2 are estimated to be 4.6 × 10 18 molecules/m 2 . Thus, the net normal component of the tail group dipole of 1 and 2 is calculated to be μ 2 = 5.2 D and μ 2 = 6.9 D, respectively.…”