Zwitterionic heterogemini surfactants containing ammonium and carboxylate headgroups 2: Aggregation behavior studied by SANS, DLS, and cryo-TEM

► Aggregation of heterogemini surfactant aggregates in solution was investigated using SANS, DLS, and cryo-TEM. ► Aggregation behavior was influenced by hydrocarbon chain length and surfactant concentration. ► These surfactants exhibit unique behavior such as transitions spherical micelle → rod-like micelle → rod-like micelle + vesicle → vesicle. ► The membrane structure of vesicles was found to be interdigitated bilayers.