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.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.