Undulations and fluctuations in a lamellar phase lyotropic liquid crystal and their suppression by weak shear flow.

Détails

ID Serval
serval:BIB_8A120EF14D81
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Undulations and fluctuations in a lamellar phase lyotropic liquid crystal and their suppression by weak shear flow.
Périodique
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Auteur(s)
Lutti A., Callaghan P.T.
ISSN
1539-3755 (Print)
ISSN-L
1539-3755
Statut éditorial
Publié
Date de publication
2006
Volume
73
Numéro
1 Pt 1
Pages
011710
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
Using multi-echo pulsed gradient nuclear magnetic resonance (NMR) we measure the anisotropic diffusion of water molecules in the lamellar phase of lyotropic system composed of cetylpyridinium chloride/hexanol diluted in brine. The technique reveals the Fourier spectrum of the molecular velocity autocorrelation function, and its repetitive compensating nature permits effective measurement in the presence of shear flow. We show that under zero shear the phase is highly oriented and that both the amplitude and fluctuation correlation time of lamellar undulations can be measured. The suppression of undulations by weak shear is apparent. We further measure transverse lamellae permeability arising from defects.
Pubmed
Web of science
Création de la notice
08/07/2013 10:22
Dernière modification de la notice
13/03/2018 11:07
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