dc.creatorAmaral, Lia Queiroz do
dc.date.accessioned2012-10-20T04:00:22Z
dc.date.accessioned2018-07-04T15:39:07Z
dc.date.available2012-10-20T04:00:22Z
dc.date.available2018-07-04T15:39:07Z
dc.date.created2012-10-20T04:00:22Z
dc.date.issued2010
dc.identifierLIQUID CRYSTALS, v.37, n.6/Jul, p.627-640, 2010
dc.identifier0267-8292
dc.identifierhttp://producao.usp.br/handle/BDPI/29042
dc.identifier10.1080/02678292.2010.487306
dc.identifierhttp://dx.doi.org/10.1080/02678292.2010.487306
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1625684
dc.description.abstractThe paper by Yu and Saupe on the first biaxial nematic phase created excitement for a number of reasons. Some theories of biaxial phases already existed, but experimental observation was still lacking. The phase was discovered in a lyotropic system with three components, which in theory is difficult. Lyotropic liquid crystals are composed of supramolecular assemblies of amphiphilic molecules, which may change shape and size as a function of concentration and temperature. The experimental phase diagram of the lyotropic biaxial phase was rather complex, with the biaxial region inserted between nematic cylindrical and nematic discotic phases via second-order transitions. In addition, re-entrant behaviour was evident. Saupe investigated further systems experimentally, observing that the biaxial phase might be absent in cases where a direct transition between the cylindrical and discotic phases occurred. He provided a range of theoretical and experimental contributions on the properties of these lyotropics, but was very cautious regarding the detailed amphiphilic assemblies involved. The present paper reviews this area, focusing on proposals for the structure of the micellar assemblies. Emphasis is placed on recent papers which indicate a transformation of the two uniaxial shapes, in mixing conditions, both from the theoretical and the experimental point of view, and to questions still requiring further study.
dc.languageeng
dc.publisherTAYLOR & FRANCIS LTD
dc.relationLiquid Crystals
dc.rightsCopyright TAYLOR & FRANCIS LTD
dc.rightsclosedAccess
dc.subjectbiaxial phase
dc.subjectlyotropic systems
dc.subjectlyonematics
dc.subjectmicelles
dc.subjectmicellar shapes
dc.titleMicelles forming biaxial lyotropic nematic phases
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución