This motion is called diffusiophoresis when the solution is considered static with particles moving in it, while it is called diffusioosmosis when the surface is viewed as static, and the solution flows.
This motion is called diffusiophoresis when the solution is considered static with particles moving in it due to relative motion of the fluid at the surface of these particles. The term diffusioosmosis is used when the surface is viewed as static, and the solution flows.