Spontaneous Formation of Mesoscale Polymer Patterns in an Evaporating Bound Solution


  • We gratefully acknowledge the supports from the 3M nontenured faculty award and the American Chemical Society Petroleum Research Fund (Grant No. 42825-G7). Supporting Information is available online at Wiley InterScience or from the author.


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Ordered mesoscale polymer patterns are formed spontaneously by allowing a drop of polymer solutions to evaporate in a restricted geometry consisting of a sphere on a flat surface (i.e., bound liquid, see figure). Gradient concentric ring patterns and self-organized punch-hole-like structures are obtained via mediating interfacial interactions between the polymer and the substrate.