| Autor: |
Solis, F. J., Stupp, S. I., de la Cruz, M. Olvera |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 2/1/2005, Vol. 122 Issue 5, p054905, 9p, 8 Diagrams, 8 Graphs |
| Abstrakt: |
Micelles, vesicles, and films composed of two species of incompatible heterogenous molecules exhibit full internal segregation of the component species. This macroscopic segregation can be inhibited by oppositely charging the two different molecular species. The degree of compatibility achieved by the charges leads to either fully homogenous mixtures or to local segregation and the possible formation of regular patterns. We investigate the induction of periodic surface patterns by the presence of opposite charges in flat films and cylindrical micelles. In the strong segregation limit the incompatibility between species can be described by a line tension parameter γ. The size of the patterns formed is of the order of a characteristic size L∼(γ/σ2)1/2, where σ is the surface charge density. The pattern symmetry on flat surfaces is function only of the fraction of area covered by the components, f: lamellar for 0.34
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| Databáze: |
Complementary Index |
| Externí odkaz: |
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