  Interfacial tension gradients drive flow along liquid-liquid interfaces in a
process known as the Marangoni effect. Such gradients can be caused by
surfactants, which has been extensively studied in the literature. Less is
known of its nanoscale properties, where molecular interfaces display
properties separate from bulk liquid matter such as interfacial viscosity. In
this report we study the molecular solutal Marangoni effect using molecular
dynamics simulations. We show that molecular interfacial effects are important
and should be accounted for in nanofluidic regimes. Hydrodynamic models can be
extended with effective terms which include them.
