Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/21202
Title: | Homogeneous length scale of shear-induced multilamellar vesicles studied by diffusion NMR | Authors: | Åslund, Ingrid Medronho, Bruno Topgaard, Daniel Söderman, Olle Schmidt, Claudia |
Keywords: | Diffusion; Pulsed-gradient-spin-echo NMR; Lamellar phase; Shear | Issue Date: | Apr-2011 | Publisher: | Elsevier | Citation: | ÅSLUND, Ingrid [et al.] - Homogeneous length scale of shear-induced multilamellar vesicles studied by diffusion NMR. "Journal of Magnetic Resonance". ISSN 1090-7807. 209:2 (2011) 291-299 | Serial title, monograph or event: | Journal of Magnetic Resonance | Volume: | 209 | Issue: | 2 | Abstract: | A recently developed protocol for pulsed gradient spin echo (PGSE) NMR is applied for the size determination of multilamellar vesicles (MLVs). By monitoring the self-diffusion behavior of water, the technique yields an estimate of the homogeneous length scale λhom, i.e. the maximum length scale at which there is local structural heterogeneity in a globally homogeneous material. A cross-over between local non-Gaussian to global Gaussian diffusion is observed by varying the experimentally defined length- and time-scales. Occasional observation of a weak Bragg peak in the PGSE signal attenuation curves permits the direct estimation of the MLV radius in favorable cases, thus yielding the constant of proportionality between λhom and radius. The microstructural origin of the Bragg peak is verified through Brownian dynamics simulations and a theoretical analysis based on the center-of-mass diffusion propagator. λhom is decreasing with increasing shear rate in agreement with theoretical expectations and results from 2H NMR lineshape analysis. | URI: | https://hdl.handle.net/10316/21202 | ISSN: | 1090-7807 | DOI: | 10.1016/j.jmr.2011.01.024 | Rights: | openAccess |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Homogeneous length scale of shear-induced.pdf | 2.1 MB | Adobe PDF | View/Open |
SCOPUSTM
Citations
13
checked on Oct 14, 2024
WEB OF SCIENCETM
Citations
10
10
checked on Oct 2, 2024
Page view(s)
286
checked on Oct 15, 2024
Download(s) 50
820
checked on Oct 15, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.