Abstract
Dielectric spectroscopy was used to determine both the real (ϵ′) and imaginary (ϵ″) parts of dielectric permittivity of a novel material, a mixture of liquid crystal 5*CB and Al2O3 powder. The main objective was to investigate the influence of surface on the molecular dynamics of 5*CB. The high-frequency process was related to the reorientation of molecules around their short axes, the same results obtained for bulk 5*CB. We find an additional low-frequency relaxation processes. This process was attributed to the surface polarization (molecules anchoring themselves to surface of Al2O3 particles). The crystallization kinetics of cholesteric liquid crystal (LC) to the metastable crystalline phase was also studied.
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