Dielectric behaviour of binary dual-frequency nematics with low crossover frequencies

Abstract

Binary dual-frequency nematic liquid crystals synthesised at the Military University of Technology were measured by dielectric means. All the investigated materials exhibit low crossover frequency. They were composed of only two molecules with longitudinal and transverse dipole moments. The main difference is the molecular weight of the molecules. Results of relaxation parameters of detected mode and crossover frequency are shown. The influence of structure on ion conductivity is discussed. The broad phase transition from an isotropic phase to a nematic one was observed.

Keywords:

• nematic liquid crystal
• dual-frequency liquid crystal
• binary dual-frequency liquid crystal
• relaxation frequency
• crossover frequency

Additional information

Funding

This work was supported by the National Centre for Research and Development under Grant [DOBR/0031/R/ID1/2012/03 (PBR/15-316/2012/WAT)].