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. Author manuscript; available in PMC: 2014 Jan 2.
Published in final edited form as: J Am Chem Soc. 2012 Jan 18;134(4):10.1021/ja211148a. doi: 10.1021/ja211148a

Figure 5.

Figure 5

Proposed mechanism of a drug-eluting 3D superhydrophobic material in a metastable Cassie state. Over time, water slowly displaces air content from the material with the transition from the metastable Cassie state to the stable Wenzel state. If treated as iterative surfaces, water will slowly penetrate each individual surface over time enabling prolonged drug release.