Twist elasticity and anchoring in a lamellar nematic phase.
Electro-optic measurements were performed on a lamellar nematic phase in which the mesogenic moieties lie in lamellae that are separated by partially perfluorinated side groups. The twist elastic constant K22, viscosity gamma(1), and the quadratic and quartic anchoring strength coefficients are reported. K22 and gamma(1) are found to be considerably smaller than that of typical three-dimensional nematics. The small K22 is due to the greatly weakened interactions between the spatially separated lamellae.
Patel
Neha M
NM
Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079, USA.
Dodge
M R
MR
Zhu
Min Hua
MH
Petschek
Rolfe G
RG
Rosenblatt
Charles
C
Prehm
Marko
M
Tschierske
Carsten
C