It was also found that there is a minimum on the V− X2(Fig.S1) curve at the same X2 at which the minimum on the curve for the “pure” aqueous solution of ethanol was observed [26]. This minimum does not depend on the TX-100 and CTAB mixture composition and concentration and it corresponds to X2= 0.1 which is higher than the ethanol mole fraction at which the maximum on the Gibbs surface excess isotherm occurs, and lower than the ethanol CAC.
In the case of¯VMof ethanol (Fig. S2) there is no extreme on the ¯VM− X2 curves. It is interesting that V(Fig. S3) and¯VM(Fig. S4) of water change as a function of X2 in the same way as in the aqueous solutions of “pure” ethanol [24]. If xBW→ 0 (xBW is the water mole fraction in the bulk phase), then¯VM. of water in the solution in the presence of ethanol (Fig. S4) approaches about 14 × 10−3dm3/mol,which is in accordance with the commonly assumed values in the solution of “pure” ethanol.