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Digital photographs of a 100-bilayer PEI/PVDMA film immersed in water at pH 3. A–C) Images acquired of the film after A) 10 minutes, B) 23 minutes, and C) 38 minutes of immersion in the water bath. D) Image of a film detached from the silicon substrate and suspended in water. E) Image of a freestanding film partially submerged in an acetone bath. F) Image of a dry, freestanding film. Scale is in cm.
