期刊
SOFT MATTER
卷 7, 期 10, 页码 4938-4947出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0sm01323d
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资金
- Swedish Research Council
- Swedish Foundation for International Cooperation in Research and Higher Education (STINT)
- New Zealand Foundation for Research Science and Technology
- Fundacao para a Ciencia e Tecnologia (FCT) [POCTI/QUI/45344/2002, POCTI/QUI/58689/2004, SFRH/BD/21467/2005]
- US NSF
The shear-induced transformations between oriented planar lamellae and a state of closely packed multilamellar vesicles (MLVs) in a lyotropic nonionic surfactant model system were studied by the combination of nuclear magnetic resonance (NMR) spectroscopy and diffusometry with magnetic resonance imaging (MRI). H-2 NMR imaging confirmed the discontinuous nature of the transition from onions to planar lamellae, revealing the spatial coexistence of both states within the gap of the cylindrical Couette geometry. On the other hand, NMR diffusion measurements in three principal directions and at various values of strain strongly suggest that a multi-lamellar cylindrical or undulated intermediate structure exists during the continuous and spatially homogeneous transition from planar lamellae to MLVs.
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