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

作　　者：Ines Ben Amor Lotfi Saadaoui Abdulaziz N.Alharbi Talal M.Althagafi Taoufik Soltani 

机构地区：[1]Université Tunis El Manar,Laboratoire de Physique de la Matiére Molle et de la Modélisation Electromagnétique,2092 Tunis [2]Physics Department,College of Science,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia

出　　处：《Chinese Physics B》2022年第10期410-416,共7页中国物理B（英文版）

摘　　要：Hydrogen-bonded polar nematic liquid crystal series with the general formula n OBAF(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(LiNbO_(3)) on the thermal and the electrical behavior of 8OBAF are investigated. The presence of LiNbO_(3) 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 

分 类 号：O753.2[理学—晶体学] TB383.1[一般工业技术—材料科学与工程]