A Novel Method for Measuring the Difference in Flexoelectric Coefficients of Nematic Liquid Crystals
The difference between e1 and e3 parameters for flexoelectric polarization, as originally defined byMeyer, is measured for nematic liquid crystal materials E7 and BL087 in Twisted Nematic (TN) cells with In-Plane Switching (IPS) electric fields using the crystal rotation method, which measures transmission as a function of angle of incidence. Values of e1 − e3 for E7 and BL087 are found to be 7.2±1.0 pCm−1 and 9.4±1.0 pCm−1 respectively.
Yuan Ming Huang
B. I. Outram and S. J. Elston, "A Novel Method for Measuring the Difference in Flexoelectric Coefficients of Nematic Liquid Crystals", Solid State Phenomena, Vols. 181-182, pp. 26-32, 2012