At the interface, the larger magnitude of the DS --C 12 E 6 LJ compared to the electrostatics shows that the energetic stabilization of DS -within the C 12 E 6 monolayer is primarily due to the total van der Waals forces between the DS -and C 12 E 6 as opposed to the electrostatic interactions between the head groups, which is almost a factor of 4 less attractive. The average LJ interaction between the DS -tail group and C 12 E 6 (head and tail) is also shown in Fig. (the dotted line), showing that the DS -tail interactions are the dominant component of the DS --C 12 E 6 LJ.