Long wavelength undulations dominate dynamics in large surfactant membrane patches
Abstract
In this study, by exposing microemulsions to small (80 nm diameter) and large (500 nm) disk shaped clay particles we were able to show the presence of long wavelength undulations that only occur for large membrane patches. A combination of small angle neutron scattering (SANS) and neutron spin echo (NSE) experiments have been applied to study microemulsions. These, consisting of D2O, d-decane and the surfactant C10E4, were used in connection with Laponite (small) and Nanofil (large) clay. To our knowledge our experiments show for the first time that the clay platelets induce lamellar ordering adjacent to the clay discs in the otherwise bicontinuous microemulsion. This is due to the fact that in purely structural investigations, radial averaging smears out the signature of the lamellar phase. For thermodynamically fluctuating membranes near interfaces the theory of Seifert predicts a cross-over of the dispersion relationship from k2 to a k3-dependence. Lastly, with the correlation length of the membrane patches being confined by the dimension of the clay platelets we were able to show that this in fact takes place but is only present for the larger Nanofil particles.
- Authors:
-
- Forschungszentrum Julich (Germany). Julich Centre of Neutron Science JCNS-1 & Institute for Complex Systems ICS-1
- Forschungszentrum Julich (Germany). Julich Centre of Neutron Science JCNS
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1265260
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nanoscale
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 6; Journal ID: ISSN 2040-3364
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Lipfert, Frederik, Holderer, Olaf, Frielinghaus, Henrich, Appavou, Marie-Sousai, Do, Changwoo, Ohl, Michael E., and Richter, Dieter. Long wavelength undulations dominate dynamics in large surfactant membrane patches. United States: N. p., 2014.
Web. doi:10.1039/C4NR06278G.
Lipfert, Frederik, Holderer, Olaf, Frielinghaus, Henrich, Appavou, Marie-Sousai, Do, Changwoo, Ohl, Michael E., & Richter, Dieter. Long wavelength undulations dominate dynamics in large surfactant membrane patches. United States. https://doi.org/10.1039/C4NR06278G
Lipfert, Frederik, Holderer, Olaf, Frielinghaus, Henrich, Appavou, Marie-Sousai, Do, Changwoo, Ohl, Michael E., and Richter, Dieter. Wed .
"Long wavelength undulations dominate dynamics in large surfactant membrane patches". United States. https://doi.org/10.1039/C4NR06278G. https://www.osti.gov/servlets/purl/1265260.
@article{osti_1265260,
title = {Long wavelength undulations dominate dynamics in large surfactant membrane patches},
author = {Lipfert, Frederik and Holderer, Olaf and Frielinghaus, Henrich and Appavou, Marie-Sousai and Do, Changwoo and Ohl, Michael E. and Richter, Dieter},
abstractNote = {In this study, by exposing microemulsions to small (80 nm diameter) and large (500 nm) disk shaped clay particles we were able to show the presence of long wavelength undulations that only occur for large membrane patches. A combination of small angle neutron scattering (SANS) and neutron spin echo (NSE) experiments have been applied to study microemulsions. These, consisting of D2O, d-decane and the surfactant C10E4, were used in connection with Laponite (small) and Nanofil (large) clay. To our knowledge our experiments show for the first time that the clay platelets induce lamellar ordering adjacent to the clay discs in the otherwise bicontinuous microemulsion. This is due to the fact that in purely structural investigations, radial averaging smears out the signature of the lamellar phase. For thermodynamically fluctuating membranes near interfaces the theory of Seifert predicts a cross-over of the dispersion relationship from k2 to a k3-dependence. Lastly, with the correlation length of the membrane patches being confined by the dimension of the clay platelets we were able to show that this in fact takes place but is only present for the larger Nanofil particles.},
doi = {10.1039/C4NR06278G},
journal = {Nanoscale},
number = 6,
volume = 7,
place = {United States},
year = {Wed Dec 03 00:00:00 EST 2014},
month = {Wed Dec 03 00:00:00 EST 2014}
}
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Works referencing / citing this record:
Tunable viscosity modification with diluted particles: when particles decrease the viscosity of complex fluids
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