Seasonal changes in morphology govern wettability of Katsura leaves - Fig 1

(a) Images showing the seasonal changes of a Katsura tree from spring to fall. The leaf color changes to reddish green—green—yellow—yellowish brown—brown. (b) Images of a sliding droplet on green and brown leaves to show the contact angles. The green leaf exhibits a superhydrophobic surface () whereas the brown leaf becomes less hydrophobic ().