Abstract
Thermistor is fabricated using thermotropic ferroelectric liquid crystalline material. The design, performance, and characteristics of this fabricated liquid crystal (LC) device are demonstrated in this article. As a representative case, the characteristics of two ferroelectric LCs (FLCs), which exhibit positive and negative temperature coefficients of resistance, are detailed. An ambient temperature ferroelectric mesogen (S)-1-[4’-(octyloxy carbonyl) phenyl]-4-[2-chloro-(4-benzamido acetyl) phenyl propionato]-Benzoate yielded negative temperature coefficient thermistor, while dextro tartaric acid with p-n decyloxy benzoic acid ferroelectric mesogen was used as a positive temperature coefficient (PTC) thermistor. This endeavor was not reported in the literature, where thermotropic mesogens are being used for thermistor [PTC and negative temperature coefficient (NTC)] application. This thermistor possesses a wide temperature range (~69° C) with a resolution of $0.05~\mu $ AV−1 and accuracy of ±0.1 °C which is more competent than its conventional counterpart. Furthermore, the heat capacity of the LC-based thermistor device is 0.2 Jg−1 K−1 for PTC and 0.4 Jg−1 K−1 for NTC.
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