Cover Picture: Surface Wrinkles for Smart Adhesion (Adv. Mater. 4/2008)



A patterned adhesive, based on surface wrinkling through swelling of a laterally confined polymer film, is presented by Alfred J. Crosby and co-workers on p. 711. The image highlights the interface between the wrinkles (bright cylinders) of the patterned adhesive separating from a glass substrate (circular region). Enhanced control of adhesion is attributed to contact line splitting, which is fundamental to adhesion control in numerous examples in nature, for example, the gecko.