Titelangaben
de Lózar, Alberto ; Schöpf, Wolfgang ; Rehberg, Ingo ; Lafuente, Oscar ; Lattermann, Günter:
Planar-fingerprint transition in a thermoreversible liquid crystalline gel.
In: Physical Review E.
Bd. 71
(Mai 2005)
Heft 5
.
- Art. Nr. 051707.
ISSN 1550-2376
DOI der Verlagsversion: https://doi.org/10.1103/PhysRevE.71.051707
Volltext
|
|||||||||
Download (156kB)
|
Abstract
A thermoreversible (physical) gel consisting of a nematic liquid crystal mixed with a small quantity of a chiral organogelator is investigated in the planar configuration. The response of the system to an external electric field reveals multistability within a small hysteresis. The relaxation of the liquid crystal under this field is characterized by two different time scales: a fast one that is connected to the tilt of the director field, and a slow one that describes the reorientation of the chiral structure. In the first case, the relaxation is nonexponential and can be described by a Kohlrausch-Williams-Watts law with a stretching parameter of 0.5.