Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2010-10-07
J. Chem. Phys. 134, 204503 (2011)
Physics
Condensed Matter
Soft Condensed Matter
30 pages, 17 fgures
Scientific paper
Using a 2D lattice model, we conduct Monte Carlo simulations of micellar aggregation of linear-chain amphiphiles having two solvophilic head groups. In the context of this simple model, we quantify how the amphiphile architecture influences the critical micelle concentration (CMC), with a particular focus on the role of the asymmetry of the amphiphile structure. Accordingly, we study all possible arrangements of the head groups along amphiphile chains of fixed length $N=12$ and 16 molecular units. This set of idealized amphiphile architectures approximates many cases of symmetric and asymmetric gemini surfactants, double-headed surfactants and boloform surfactants. Consistent with earlier results, we find that the number of spacer units $s$ separating the heads has a significant influence on the CMC, with the CMC increasing with $s$ for $s
Jackson Douglas R.
MacNeil Jennifer
Marangoni Gerrard D.
Mohareb Amir
Poole Peter H.
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