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The Physics of Lyotropic Liquid CrystalsPhase Transitions and Structural Properties$
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Antônio M. Figueiredo Neto and Silvio R. A. Salinas

Print publication date: 2005

Print ISBN-13: 9780198525509

Published to Oxford Scholarship Online: January 2010

DOI: 10.1093/acprof:oso/9780198525509.001.0001

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The Lyotropic One-, Two- And Three-Dimensionally Ordered Phases

The Lyotropic One-, Two- And Three-Dimensionally Ordered Phases

(p.219) 7 The Lyotropic One-, Two- And Three-Dimensionally Ordered Phases
The Physics of Lyotropic Liquid Crystals

Antônio M. Figueiredo Neto

Silvio R. A. Salinas

Oxford University Press

This chapter presents a number of one-, two-, and three-dimensionally ordered lyotropic mesophases observed in binary and multicomponent mixtures. Lamellar phases are discussed on the basis of experimental results obtained from several techniques. Phase diagrams and phase transitions are presented and discussed. A sodium dodecylsulfate-based mixture is used as an introductory example. Two-dimensional lyotropic phases of hexagonal, monoclinic, rectangular and tetragonal symmetries, inverted and direct, are presented in this chapter. Several three-dimensional lyotropic micellar structures are discussed (cubic, hexagonal, rhombohedral, tetragonal, bicontinuous cubic, bicontinuous sponge and bicontinuous mesh). Some of these structures show inverted topology. The experimental evidence for the existence of these phases and phase diagrams are presented and discussed.

Keywords:   lamellar phases, hexagonal symmetries, monoclinic symmetries, rectangular symmetries, tetragonal symmetries, cubic structures, sponge structures, bicontinuous structures, mesh

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