Title :
Collective dynamic modes of microconfined ferroelectric liquid crystals
Author :
Rozanski, S.A. ; Stannarius, R. ; Kremer, F.
Author_Institution :
Inst. of Exp. Phys. 1, Leipzig Univ., Germany
fDate :
6/1/2001 12:00:00 AM
Abstract :
The dielectric properties of the ferroelectric liquid crystal 4-oetyloxy-4-(2-methylbutyloxy)carbonyl-phenylbenzoate in different confinements have been investigated. While the molecular dynamic processes are not influenced by the micro-porous confinement, the collective relaxation processes are strongly affected by restricted geometry. Changes of shape, dispersion and frequency of the relaxation processes caused by confinement were observed. The Goldstone mode present in the bulk ferroelectric liquid crystal is not observed in the porous materials. The reason for the disappearance of the Goldstone mode depends on the structure, pore size and surface interactions in confinement
Keywords :
dielectric relaxation; ferroelectric liquid crystals; organic compounds; permittivity; porous materials; 4-oetyloxy-4-(2-methylbutyloxy)carbonyl-phenylbenzoate; Goldstone mode; collective dynamic modes; collective relaxation processes; dielectric properties; dispersion; micro-porous confinement; microconfined ferroelectric liquid crystals; molecular dynamic processes; pore size; porous materials; relaxation processes; restricted geometry; surface interactions; Biomembranes; Dielectric liquids; Electrochemical impedance spectroscopy; Ferroelectric materials; Filters; Frequency; Geometry; Liquid crystals; Magnetic confinement; Physics;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
