Figure 1.
The initial structure of the coarse-grained molecular dynamics simulation: CA, SDS and Na+ are represented in red, yellow and blue van der Waals representation, respectively.
Figure 2.
Change in the intensity ratio I1/I3 of pyrene as function of the total concentration of surfactants at different temperatures, cmc is determined by Boltzmann fitting.
Table 1.
Temperature dependent critical micelle concentration obtained by fluorimetric and tensiometric experiments (noted by cmcexf(T) and cmcext(T), respectively), ideal critical micelle concentration (cmcid), mole fraction of NaCA (x1) in the mixed micelle and interaction parameter between the building units (β1,2) as a function of temperature for the binary mixture of NaCA and SDS (1∶1).
Figure 3.
Micelle of pure SDS (A) and the mixed micelle of SDS and CA: the steroid skeleton of the CA anion breaks up the continuous surface density of electrical charge (B).
Figure 4.
Change of specific conductivity as function of surfactant concentration.
Figure 5.
(a) Time evolution of the number of clusters (NOC), free and condensed Na+ cations in the course of the molecular dynamics simulation applying block averages using 100 ns intervals. Dashed lines represent the mean and the transparent bands the standard deviation (values were calculated from 0.6 µs to 10 µs). (b) The distribution of the cluster size. (c) Selected frames from the molecular dynamics trajectory at different time intervals.
Figure 6.
The average SDS content (x2) of the micelle (upper panel) and their relative shape anisotropy (lower panel, Κ2) as a function of the cluster size.
Figure 7.
Radial distributions of the various interaction sites of SDS (upper panel) and CA (lower panel) surfactants.
On the lower panel the first and the second vertical lines indicate the position of peak maxima of C4 and SO3 beads of SDS, respectively.
Figure 8.
Distribution of the angle between
and
vectors.