Publication Title

Europhysics Letters

Publication Date

12-1-1994

Document Type

Article

DOI

10.1209/0295-5075/28/7/006

Keywords

Liquid Crystals, Steady State, Transition, Scattering, Surfactant, Selection, Alignment, Behavior, Fluids

Disciplines

Physics

Abstract

Small-angle neutron scattering was employed to study the effect of shear flow on the nematic (N) and lamellar (L(alpha)) phases in aqueous solutions of cesium perfluoro-octanoate. Shear rates as high as similar to 4000 s(-1) were used. The N phase was found to align with the director in the direction of the gradient velocity. The L, phase oriented with lamellae parallel to the shear plane. This change in equilibrium orientation is attributed, primarily, to changes in the value of the Ericksen viscosity parameter at. Subtle shear-rate-dependent director reorientations were also observed in the proximity of the N-to-L(alpha) phase transition.

Comments

Copright 1994 Institute of Physics. Available on publisher's website at http://dx.doi.org/10.1209/0295-5075/28/7/006.


Included in

Physics Commons

Share

COinS