Influences of nanoparticles and chain length on thermodynamic and electrical behavior of fluorine liquid crystals

doi:10.1088/1674-1056/ac7293

中国物理B ›› 2022, Vol. 31 ›› Issue (10): 104202-104202.doi: 10.1088/1674-1056/ac7293

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Influences of nanoparticles and chain length on thermodynamic and electrical behavior of fluorine liquid crystals

Ines Ben Amor¹, Lotfi Saadaoui^1,†, Abdulaziz N. Alharbi², Talal M. Althagafi², and Taoufik Soltani¹

1. Université Tunis El Manar, Laboratoire de Physique de la Matière Molle et de la Modélisation Electromagnétique, 2092 Tunis;
2. Physics Department, College of Science, Taif University, P. O. Box 11099, Taif 21944, Saudi Arabia

收稿日期:2022-03-13 修回日期:2022-04-28 出版日期:2022-10-16 发布日期:2022-10-17
通讯作者: Lotfi Saadaoui E-mail:lotfi.saadaoui@fst.utm.tn

Influences of nanoparticles and chain length on thermodynamic and electrical behavior of fluorine liquid crystals

Ines Ben Amor¹, Lotfi Saadaoui^1,†, Abdulaziz N. Alharbi², Talal M. Althagafi², and Taoufik Soltani¹

1. Université Tunis El Manar, Laboratoire de Physique de la Matière Molle et de la Modélisation Electromagnétique, 2092 Tunis;
2. Physics Department, College of Science, Taif University, P. O. Box 11099, Taif 21944, Saudi Arabia

Received:2022-03-13 Revised:2022-04-28 Online:2022-10-16 Published:2022-10-17
Contact: Lotfi Saadaoui E-mail:lotfi.saadaoui@fst.utm.tn

摘要/Abstract

摘要： Hydrogen-bonded polar nematic liquid crystal series with the general formula nOBAF (n = 7—12) is studied. The mesomorphic characterization is demonstrated through differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The complexes with short alkyl chains (n=7, 8) present a wide nematic range and monotropic smectic F mesophase, whereas the longer alkyl chain (n=10—12) analogues show high melting and low clearing mesomorphic liquid crystals. The thermal range of the mesophase and the birefringence increase with chain length decreasing. Furthermore, the effect of the nanoparticles (LiNbO₃) on the thermal and the electrical behavior of 8OBAF are investigated. The presence of LiNbO₃ nanoparticles increases the conductivity and reduces the resistivity of the complex.

关键词: fluorine liquid crystal, polar nematic, ferroelectric nanoparticles, thermal stability, dielectric behavior

Abstract: Hydrogen-bonded polar nematic liquid crystal series with the general formula nOBAF (n = 7—12) is studied. The mesomorphic characterization is demonstrated through differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The complexes with short alkyl chains (n=7, 8) present a wide nematic range and monotropic smectic F mesophase, whereas the longer alkyl chain (n=10—12) analogues show high melting and low clearing mesomorphic liquid crystals. The thermal range of the mesophase and the birefringence increase with chain length decreasing. Furthermore, the effect of the nanoparticles (LiNbO₃) on the thermal and the electrical behavior of 8OBAF are investigated. The presence of LiNbO₃ nanoparticles increases the conductivity and reduces the resistivity of the complex.

Key words: fluorine liquid crystal, polar nematic, ferroelectric nanoparticles, thermal stability, dielectric behavior

中图分类号: (Liquid crystals)

42.70.Df

61.30.Eb (Experimental determinations of smectic, nematic, cholesteric, and other structures) 61.30.-v (Liquid crystals)

Ines Ben Amor, Lotfi Saadaoui, Abdulaziz N. Alharbi, Talal M. Althagafi, and Taoufik Soltani. Influences of nanoparticles and chain length on thermodynamic and electrical behavior of fluorine liquid crystals[J]. 中国物理B, 2022, 31(10): 104202-104202.

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Influences of nanoparticles and chain length on thermodynamic and electrical behavior of fluorine liquid crystals

Influences of nanoparticles and chain length on thermodynamic and electrical behavior of fluorine liquid crystals

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