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Conductivity Mechanism of Smectic A Liquid Crystal 4-((S)-3,7-Dimethyloctyloxy)-2-[[[4-(S)-2-methylbutoxyphenyl]imino]methyl]Phenol in Different Temperatures

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Determination of liquid crystals' conductivity mechanisms depending on different temperatures becomes important because of the technological device applications. In this study, ac conductivity mechanisms of the 4-((S)-3,7-Dimethyloctyloxy)-2-[[[4-(S)-2-methylbutoxyphenyl]imino]methyl]phenol (DMIP) have been analyzed by means of impedance spectroscopy measurements. The mesophase behaviour has been studied by differential scanning calorimetry and polarizing microscopy. It has been found that this liquid crystal (LC) exhibits enantiotropic Smectic A (SmA) mesophase at very low temperatures. The real and imaginary parts of dielectric constant have been calculated by capacitance method. It has been determined that the conductivity mechanism of the LC alters with the temperature interval 25–52 °C. The frequency dependence of ac conductivity (σ ac) of the LC has been analyzed by means of frequency exponent parameter, s.
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Keywords: AC CONDUCTIVITY; DIELECTRIC STRENGTH; IMPEDANCE SPECTROSCOPY; LIQUID CRYSTAL

Document Type: Research Article

Publication date: June 1, 2016

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  • Journal of Nanoengineering and Nanomanufacturing is a multidisciplinary peer-reviewed international journal consolidating research activities in all experimental and theoretical aspects of nanoscale engineering and manufacturing science into a single and unique reference source. The main aim of this journal is to provide an international forum for scientists, engineers, researchers, and academicians working in the field of nanoscale science and engineering, nanomanufacturing science, processing technology and applications.
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