Peculiar surface profile of poly(ethylene oxide) film with ring-like nucleation distribution induced by Marangoni flow effect.

Highlights: [•] The PEO film contains a ring at the edge and a volcano-like profile in the middle. [•] A special ring-like nucleation provides a visual mark of Marangoni convection. [•] The decreasing viscous stress is the key point of contact line recession. [Copyright &y& Elsevier]