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Flexoelectric coefficient measurements in the nematic liquid crystal phase of 5CB
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71. The temperature as determined by the readout of the hot-stage controller is precise (to the nearest 0.01°C), but not necessarily accurate. However, the value of Tc as determined using a hot-stage and hot-stage controller with a Fréedericksz cell was 35.51 °C, which supports the supplier's value.
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We report measurements of the bulk flexoelectric coefficient (e 1 − e 3) of 5CB (4-Cyano-4′-pentylbiphenyl), in the temperature range 20–34 °C, with a relative combined standard uncertainty of 2 %. The chiral flexoelectro-optic method was used with 1 wt % high-twisting-power chiral additive. At 25 °C, (e 1 − e 3) = 7.10 pC/m with a combined standard uncertainty of 0.14 pC/m.
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