“…A = oil and B = water, which are usually segregated in A ∞ B ∞ , can form layered structures AB (Fig. 1) or a three-dimensional network of minimal surfaces like D (which corresponds to the D* periodic zero-potential surface of NaTl) or P (P* periodic zero-potential surface of CsCl) with T 1 = 4 or T 2 = 6 openings to neighboring domains [8]. The repulsive interactions between A = oil and B = water (or attractive A-A and B-B interactions) give rise to a minimal surface between A and B.…”