21_13b/2009Symmetric Wrinkling Patterns: Diffusion-Controlled, Self-Organized Growth of Symmetric Wrinkling Patterns (Adv. Mater. 13/2009)

Irradiation of thin polystyrene films leads to the formation of a stiff skin layer, which can dynamically wrinkle under osmotic swelling of a small molecule penetrant from localized defects in the film. As shown by Christopher Stafford and co-workers on p. 1358, these wrinkled surfaces display a rich diversity of pattern symmetries that are not readily accessible by any other route.

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