| Autor: |
Boué, François, Fameau, Anne-Laure, Douliez, Jean-Paul, Ott, Frédéric, Novales, Bruno, Cousin, Fabrice |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Journal of Colloid and Interface Science 362, 2 (2011) 397-405 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.jcis.2011.06.080 |
| Popis: |
The behavior at the air/water interface of multilamellar tubes made of the ethanolamine salt of the 12-hydroxy stearic acid as a function of the temperature has been investigated using Neutron Reflectivity. Those tubes are known to exhibit a temperature tunable diameter in the bulk. We have observed multilamellar tubes adsorbed at the air/water interface by specular neutron reflectivity. Interestingly, at the interface, the adsorbed tubes exhibit the same behavior than in the bulk upon heating. There is however a peculiar behavior at around 50\degree for which the increase of the diameter of the tubes at the interface yields an unfolding of those tubes into a multilamellar layer. Upon further heating, the tubes re-fold and their diameter re-decrease after what they melt as observed in the bulk. All structural transitions at the interface are nevertheless shown to be quasi-completely reversible. This provides to the system a high interest for its interfacial properties because the structure at the air/water interface can be tuned easily by the temperature. |
| Databáze: |
arXiv |
| Externí odkaz: |
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