Self-assembly behaviors of a series of zwitterionic heterogemini surfactants C$_{m}$H$_{2m+1}$-PO$^{4-}$-(CH$_{2}) _{2}$-N$^{+}$(CH$_{3})_{2}$-C$_{n}$H$_{2n+1}$, abbreviated as C$_{m}$-P-N-C$_{n}$ $(m, n$=9, 9; 9, 12; 9, 15; 9, 18; 12, 12; 12, 15; 12, 18; 15, 15; 15, 18 and 18, 18), have been investigated in aqueous solution with a dissipative particle dynamics (DPD) method. Morphologies such as sphere (S), rod (R), planar grid (PG), lamella (L), honeycomb (H), one-, two- and three-dimensional tunnels (1DT, 2DT and 3DT) have been observed. With increase of surfactant concentration in the aqueous solution, a distinct transition path S—R—PG—3DT—L—2DT—1DT is shown to be common for all simulated systems. Besides, the hydrophobic chain length has a significant influence on the self-assembly behaviors when $m\neq n$. Radial distribution function is an effective method for quantitative evaluation of interaction and relationship between each functional group in the C$_m$-P-N-C$_n$ molecule and water. The results provide an insight into self-assembly behaviors of zwitterionic heterogemini surfactants and corresponding applications.
