| Autor: |
M. Puggelli, G. Prelazzi, G. Gabrielli |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
Trends in Colloid and Interface Science V ISBN: 9783798508859 |
| DOI: |
10.1007/bfb0115971 |
| Popis: |
Monolayers and Langmuir-Blodgett (LB) multilayers were studied in order to prepare mimetic membranes permeable to gases and ions. In particular, valinomycin (Val) monolayers were studied on subphases containing K+ and Na+. Spreading isotherms were indipendent from temperature and from the subphase and showed prevalently a liquid-expanded phase. Monolayer thickness was measured ellipsometrically and it showed a conformation of Val almost planar at the interface. Collapsed films, trnasferred on solid support, were characterized with SEM. Bidimensional mixture of Val and stearic acid (SA) were studied in mono and LB plurilayers. The Val and SA are immiscible in bidimensional phase and their immiscibility does not vary with the ions used in the subphase. ESCA spectra were recorded for LB films of Val alone and Val/SA mixtures. The results showed the presence of K+ in LB multilayers. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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