The ability of surfactant molecules to self-assemble into monolayers at the air-water interface (AWI) is well-understood in terms of the thermodynamics associated with their amphiphilic character. An amphiphilic molecule, which is defined by a hydrophilic "head" group covalently bound to a hydrophobic "tail" group, is particularly suited for self-assembly in aqueous solution due to the balancing of the hydrophobic effect 3-10 between tail groups with the high water-solubility of the head groups. While many general features of this phenomenon are understood, the enormous variety of possible combinations of head and tail groups bound within a single surfactant, compounded with the even greater variety of possible surfactant mixtures, opens questions about how one might optimize a surfactant system for a particular application. Recently, as part of a team of researchers looking to use soap bubbles for artificial photosynthesis , we have shown that surfactant interfaces including C 12 E 6 can lead to interfacial electric fields as large as 1V/nm. These magnitude and length-scales of these fields are finely tuned by both the length of the surfactant and oriented water structure. Within this context, computational techniques for decomposing the thermodynamic quantities 6,14-23 driving self-assembly are valuable in developing theoretical principles which can guide the rational design of materials with desired properties.