Correlations Between Spectral, Time and Orientation Parameters of Liquid Crystal Cells with WS2 Nanoparticles

Abstract

В настоящей работе на основе анализа спектральных параметров, ориентирующего угла наклона, а также временных зависимостей реакции и релаксации среды: нематическая жидкокристаллическая мезофаза-наночастицы WS2, установлены корреляционные зависимости, связанные с формированием межмолекулярного взаимодействия между CN-группой жидкого кристалла и WS2-наночастицами, что подтверждается как экспериментами, так и частично квантово-химическим моделированием. Ключевые слова: жидкие кристаллы, процесс сенсибилизации мезофазы, наночастицы WS2, спектры, угол подвеса молекулярной среды, быстродействие.

Rotation of the light polarization plane in Liquid Crystals with sensitizers based on WS-=SUB=-2-=/SUB=- nanotubes

“…The results obtained in the present study may be associated with changes in the refraction index anisotropy (n − n o ). This is substantiated by data from earlier studies [13,14] into the switching performance of LC cells. It was demonstrated there that the switching time, which is inversely proportional to the anisotropy of permittivity ε = ε − ε ⊥ , decreases following the introduction of WS 2 nanotubes.…”

“…The cell with 0.1 wt.% WS 2 is an exception to this rule. It has been demonstrated earlier in the study of photorefractive and dynamic properties that this value corresponds to the concentration optimum at which a nematic-quasi-smectic state transition occurs [13][14][15]. Thus, this transition also manifests itself as a change in polarization properties.…”

“…Having analyzed the data on reorientation of the polarization plane in LC cells in the off state and compared them with the results reported in [13][14][15], we arrive at the following conclusions.…”

“…This problem is solved partially by adjustment, although it may be infeasible in the case of a close arrangement of functional layers. It was found in [13][14][15] that the introduction of tungsten disulfide nanotubes enhances the response speed of LC cells based on 4'-pentyl-4-biphenylcarbonitrile (Aldrich Co.). In the present study, we examine the influence of concentration of WS 2 nanoparticles on the magnitude of variation of the light polarization plane orientation in passing through an LC medium.…”