Hierarchically Structured Superoleophobic Surfaces with Ultralow Contact Angle Hysteresis

Hierarchically structured, superoleophobic surfaces are demonstrated that display one of the lowest contact angle hysteresis values ever reported - even with extremely low-surface-tension liquids such as n-heptane. Consequently, these surfaces allow, for the first time, even approximate to 2 mu L n-heptane droplets to bounce and roll-off at tilt angles <= 2 degrees.