Nanostructured Self‐Organized Heliconical Nematic Liquid Crystals: Twist‐Bend Nematic Phase

Bisoyi, Hari Krishna; Li, Quan

doi:10.1002/9783527807369.ch16

Cited by 1 publication

(1 citation statement)

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“…For decades, liquid crystals (LCs) have remained a bright example of functional soft matter demonstrating a number of fundamentally new properties [1][2][3][4]. Liquid crystals are able to spontaneously form various nanoscale structures, which leads to the presence of a large number of mesophases with their own speci c features [5][6][7]. In addition, the ability to respond to some external in uences (electric and magnetic elds, temperature, pressure, and electromagnetic radiation) allowed liquid crystals to be widely used in tunable 3 Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Electro-optical performance of nematic liquid crystals doped with gold nanoparticles

Чаусов¹,

Kurilov²,

Kucherov³

et al. 2020

J. Phys.: Condens. Matter

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The effect of gold nanoparticles on the dielectric, electro-optical, and rheological properties of the ZhK-1289 liquid-crystal mixture that de ne the response time of liquid-crystal devices with a concentration range of 0.06-5 wt% was investigated in this study. A phase diagram of the obtained composites was formed demonstrating an increase in the clearing temperature and a broadening of the mesophase existence range in the case of doping nanoparticles. It was found that in the obtained dispersions there are structural rearrangements in the low concentration range leading to an increase in the lateral bending stiffness of the liquid-crystal matrix, a decrease in the response time and threshold voltage of the Freedericksz transition, and also an increase in the anisotropy of the dielectric permittivity and the refraction index. The improvement of the electro-optical performance of the liquid crystal can be caused by the nanoparticle adsorption of impurity ions, which reduces the eld-screening effect in the liquid crystal. According to the results obtained in this study, the optimal values of the physical parameters of liquid-crystal composites doped with gold nanoparticles for their application in practice are achieved in a concentration range of 0.5-1 wt%.

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