Graphene: Unraveling the Water Impermeability Discrepancy in CVD‐Grown Graphene (Adv. Mater. 30/2018)

In article number 1800022, Jinsung Kwak, Soon‐Yong Kwon, and co‐workers demonstrate that water‐permeable routes concentrated on graphene wrinkles are predominantly induced by the delamination of graphene on Cu during the cooling stage, especially at the intersection of Cu step edges and wrinkles, owing to their higher adhesion energy. The investigated routes are site‐selectively passivated by an electron‐beam‐induced amorphous carbon layer.