Beigmohammadi Maryam, Khadem Sadigh Mahsa, Poursamad Jaafar
Department of Laser and Optics Engineering, University of Bonab, Bonab, Iran.
Sci Rep. 2024 Mar 8;14(1):5756. doi: 10.1038/s41598-024-56219-7.
In response to the burgeoning interest in enhancing the properties of liquid crystal composites, this research systematically explores the intricate interplay between MBBA nematic liquid crystals and ferroelectric barium titanate nanoparticles. The focus is modulating dielectric properties under temperature, frequency, and an applied electric field. Nuanced insights into temperature-dependent behavior, parallel and perpendicular component alterations, and a nonlinear correlation between nanoparticle concentration and dielectric constant are revealed. The study delves into dielectric anisotropy, indicating a reduction with increasing temperature. Structural analyses validate size reduction and crystal phase maintenance of barium titanate nanoparticles (NPs), emphasizing their impact on dielectric characteristics. Frequency-dependent investigations underscore a consistent decline in permittivity with rising frequency across nanoparticle concentrations. Application of an electric field in filling process of liquid crystal cells reveals irregular changes in dielectric constant, holding promise for tailored applications in display technologies. These comprehensive findings offer valuable insights into manipulating dielectric anisotropy properties of MBBA liquid crystal by a simple method for potential advancements in optoelectronic devices and display technologies.
为了回应人们对增强液晶复合材料性能日益增长的兴趣，本研究系统地探索了MBBA向列型液晶与铁电钛酸钡纳米颗粒之间复杂的相互作用。重点是在温度、频率和外加电场下调节介电性能。揭示了对温度依赖性行为、平行和垂直分量变化以及纳米颗粒浓度与介电常数之间非线性相关性的细微见解。该研究深入探讨了介电各向异性，表明其随温度升高而降低。结构分析证实了钛酸钡纳米颗粒（NPs）的尺寸减小和晶相维持，强调了它们对介电特性的影响。频率依赖性研究强调，在不同纳米颗粒浓度下，介电常数随频率升高而持续下降。在液晶盒填充过程中施加电场，揭示了介电常数的不规则变化，这为显示技术中的定制应用带来了希望。这些全面的发现为通过一种简单方法操纵MBBA液晶的介电各向异性特性提供了有价值的见解，有望推动光电器件和显示技术的潜在进步。
