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Murat Guvendiren, Shu Yang and Jason A. Burdick Swelling-Induced Surface Patterns in Hydrogels with Gradient Crosslinking Density Advanced Functional Materials 19

Article first published online: 19 AUG 2009 | DOI: 10.1002/adfm.200900622

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The dynamic evolution of a wide range of surface patterns, including a highly ordered hexagonal pattern in transit to peanut shape, lamellar, and random worm-like structures, is reported in poly (hydroxyethyl methacrylate) hydrogel films with a modulus gradient through film depth. The order of the patterns is determined by the crosslinker concentration and the characteristic wavelength is proportional to the initial gel thickness.

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