We have studied surfactants and reverse micelles in supercritical carbon di
oxide (SCO2) by molecular dynamics simulation using molecular potential mod
els that we have developed for this purpose. In this work we present simula
tion results suggesting how varying the surfactant molecular architecture a
nd chemistry may affect the structure and properties of reverse micelles in
SCO2. We focus on a dichain surfactant, (C7H15)(C7F15)CHSO4-Na+, which for
ms reverse micelles with aqueous cores in SCO2.