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Size Determination of Shear-Induced Multilamellar Vesicles by Rheo-NMR Spectroscopy

Medronho, Bruno LU ; Schmidt, C.; Olsson, Ulf LU and Miguel, M. G. (2010) In Langmuir 26(3). p.1477-1481
Abstract
A model for analyzing the deuterium (H-2) NMR line shapes of D2O ill surfactant multilamellar vesicle (MLV, "onion") systems is proposed. The assumption of the slow exchange of water molecules between adjacent layers implies that the H-2 NMR line shape is simply given by a SLIM of Lorentzians if the condition of motional narrowing is also fulfilled. Using the classical two-step model for the NMR relaxation in structure fluids allows Lis to calculate how the NMR line shape depends oil the MLV size. The model is tested oil two different MLV systems for which the NMR line shapes are measured as a function of the applied shear rate using rheo-NMR. The MLV sizes obtained are in good agreement with previous data from rheo-small-angle light... (More)
A model for analyzing the deuterium (H-2) NMR line shapes of D2O ill surfactant multilamellar vesicle (MLV, "onion") systems is proposed. The assumption of the slow exchange of water molecules between adjacent layers implies that the H-2 NMR line shape is simply given by a SLIM of Lorentzians if the condition of motional narrowing is also fulfilled. Using the classical two-step model for the NMR relaxation in structure fluids allows Lis to calculate how the NMR line shape depends oil the MLV size. The model is tested oil two different MLV systems for which the NMR line shapes are measured as a function of the applied shear rate using rheo-NMR. The MLV sizes obtained are in good agreement with previous data from rheo-small-angle light scattering. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
26
issue
3
pages
1477 - 1481
publisher
The American Chemical Society
external identifiers
  • wos:000273831700020
  • scopus:75749119370
ISSN
0743-7463
DOI
10.1021/la903682p
language
English
LU publication?
yes
id
2c11f979-8839-4e17-8f91-901d01554e87 (old id 1547249)
date added to LUP
2010-02-24 10:49:20
date last changed
2018-05-29 10:22:01
@article{2c11f979-8839-4e17-8f91-901d01554e87,
  abstract     = {A model for analyzing the deuterium (H-2) NMR line shapes of D2O ill surfactant multilamellar vesicle (MLV, "onion") systems is proposed. The assumption of the slow exchange of water molecules between adjacent layers implies that the H-2 NMR line shape is simply given by a SLIM of Lorentzians if the condition of motional narrowing is also fulfilled. Using the classical two-step model for the NMR relaxation in structure fluids allows Lis to calculate how the NMR line shape depends oil the MLV size. The model is tested oil two different MLV systems for which the NMR line shapes are measured as a function of the applied shear rate using rheo-NMR. The MLV sizes obtained are in good agreement with previous data from rheo-small-angle light scattering.},
  author       = {Medronho, Bruno and Schmidt, C. and Olsson, Ulf and Miguel, M. G.},
  issn         = {0743-7463},
  language     = {eng},
  number       = {3},
  pages        = {1477--1481},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Size Determination of Shear-Induced Multilamellar Vesicles by Rheo-NMR Spectroscopy},
  url          = {http://dx.doi.org/10.1021/la903682p},
  volume       = {26},
  year         = {2010},
}