Flow birefringence in lyotropic mixtures in the isotropic phase

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.51.567· OSTI ID:6702420

Fernandes, P R.G.; Figueiredo Neto, A M ^[1]

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1. Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 20516, 01498-970-Sao Paulo, Sao Paulo (Brazil)

The flow-induced birefringence ([delta][ital n]) in lyotropic mixtures in the isotropic phase (ISO) was measured by means of optical techniques. As a function of temperature, the ISO is surrounded by two lamellar (LAM) phases. The shear flow produced by a perturbation in ISO induces a birefringent phase, which relaxes back to ISO with a typical relaxation time [tau]. [tau] increases near the transition to the more ordered LAM phases, and the behavior of [tau] versus temperature indicates the existence of a virtual nematic phase in the isotropic domain.

• OSTI ID: 6702420
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Vol. 51:1; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
LIQUID CRYSTALS
BIREFRINGENCE
RELAXATION TIME
CRYSTAL-PHASE TRANSFORMATIONS
DECANOLS
ISOTROPY
MICELLAR SYSTEMS
POTASSIUM COMPOUNDS
TEMPERATURE DEPENDENCE
X-RAY SPECTROSCOPY
ALCOHOLS
ALKALI METAL COMPOUNDS
CRYSTALS
FLUIDS
HYDROXY COMPOUNDS
LIQUIDS
ORGANIC COMPOUNDS
PHASE TRANSFORMATIONS
REFRACTION
SPECTROSCOPY
665000* - Physics of Condensed Matter- (1992-)