Figure 2.

(A) Cryo-TEM image of CTAB/FC₇ (2 wt % total surfactant, CTAB/FC₇ ratio of 2:8 by weight) vesicle system with a significantly more narrow size distribution than the CTAB/SOS vesicles in Fig. 1. All of the vesicles were unilamellar under these conditions. The vesicle phase exists on the FC₇- (and FC₅-) rich side at concentrations between ≈2 and 4 wt % surfactant and for mixing ratios greater than 80% FC₇ (and FC₅). (B) Vesicle size distribution histogram determined from the cryo-TEM images; the solid line is a fit to Eq. 6 with R_o = 23 nm and K = 6 ± 2 k_BT.