Electrooptic and Dielectric Studies in Cadmium Sulphide Nanorods/Ferroelectric Liquid Crystal Mixtures

Abstract

We present the results based on the electrooptic and dielectric studies in cadmium sulphide (CdS) nanorods/ferroelectric liquid crystal mixtures. Doping of CdS nanorods increases the spontaneous polarization and response time, which due to large dipole-dipole interaction and increase in anchoring energies exists between nanorods and FLC molecules. Dielectric measurements revealed a decrease (~40% for 0.3% CdS in FLC) in permittivity and dielectric strength in doped sample cell than pure FLC mixture. A decrease in dc conductivity and relaxation frequency with doping concentration was also noticed. The preexponent factor and fractional exponent factor are found as predicated by existing theories.

ZnO1−xSxNanosphere in Ferroelectric Liquid Crystal Matrix: The Effect of Aggregation and Defects on the Dielectric and Electro-Optical Properties

“…This local internal electric field increases the separation between polarization charges on the LC molecules which results in the increased dipole moment of the doped system. The increased dipole moments result the increased spontaneous polarization of the NS-doped FLC system [19].…”

Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena

“…A similar trend was found in ferroelectric liquid crystal KCFLC10R doped with CdS nanorods (0.1-0.3 wt. %) [193]. However, the reduction in the electrical conductivity was more than five-fold (from m S / 10 7 .…”

“…Semiconductor nanoparticles in liquid crystals were also studied from the perspective of the ion capturing processes [191][192][193][194]. Table 5 provides a short summary of the obtained results.…”

“…CdSe FLC Decrease in the concentration of ions [191,192] CdS FLC Decrease in the conductivity [193] ZnS CdSe /…”

Effects of silver nanoparticles doping on morphology and luminescence behaviour of ferroelectric liquid crystals Langmuir–Blodgett films

“…[11,12] Doping of nano-objects in FLC matrix has their effect on switching time, spontaneous polarisation and rotational viscosity and photoluminescence intensity. [13][14][15][16][17] Silver nanoparticles in nematic LC have improved its dielectric behaviour [18][19][20] -the nematic LC shows enhancement in luminescence [21] and variation in electro-optical parameters. [22,23] We have doped silver nanoparticles in a ferroelectric liquid crystal, because Ag nanoparticles have several optical properties.…”