Observation of hysteresis in the properties of a ternary lyotropic liquid crystal system

Vijayaraghavan, D.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4070

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DC Field	Value	Language
dc.contributor.author	Vijayaraghavan, D.	-
dc.date.accessioned	2011-08-09T05:40:45Z	-
dc.date.available	2011-08-09T05:40:45Z	-
dc.date.issued	2011	-
dc.identifier.citation	Molecular Crystals and Liquid Crystals, 2011, Vol.547, p189	en
dc.identifier.issn	1542-1406	-
dc.identifier.issn	1563-5287 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/4070	-
dc.description	Restricted Access.	en
dc.description.abstract	We have carried out differential scanning calorimetry (DSC), electrical conductivity and mass diamagnetic susceptibility studies on sodium decylsulfate(SdS)= decanol=water system for two different concentrations of the constituents. In these concentrations, this system exhibits calamitic nematic (Nc), isotropic (I) and hexagonal (H) phases on heating from the room temperature. On heating the samples, the DSC thermograms exhibit two peaks which can be related to the reported Nc-I and I-H phase transition temperatures. However, on cooling from a high temperature they do not exhibit any peak. The temperature dependence of electrical conductivities and magnetic susceptibilities of these samples are also different while heating and on cooling. Based on our reported correlation between the susceptibility and micellar sizes in an ionic micellar system, we infer that the observed hysteresis behavior in the susceptibility in this system is related to the difference in the temperature dependence of the micellar sizes on heating and on cooling. The electrical conductivity in these ternary systems is related to the mobility of the counter ions which in turn depends on the viscosity of water. Hysteresis seen in the conductivity may be related to the changes in the viscosity of water due to the difference in the temperature dependence of the micellar sizes on heating and cooling. Incidentally, in water based nanofluids, the sizes of the suspended nanoparticles have profound influence on the viscosity of water.	en
dc.language.iso	en	en
dc.publisher	Taylor & Francis	en
dc.relation.uri	http://dx.doi.org/10.1080/15421406.2011.572052	en
dc.rights	2011 Taylor & Francis	en
dc.subject	Electrical conductivity	en
dc.subject	hysteresis	en
dc.subject	magnetic susceptibility	en
dc.subject	micelles	en
dc.subject	viscosity of water	en
dc.title	Observation of hysteresis in the properties of a ternary lyotropic liquid crystal system	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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