Lithographic Design of Overhanging Microdisk Arrays Toward Omniphobic Surfaces

Omniphobic surfaces are created by designing an array of overhanging microdisks on a polymer film through two steps of photolithography. Two distinct edges and the large height of the microdisks relative to their separation ensure the formation of an air mat under the microdisks, providing an omniphobic property. Moreover, the freestanding omniphobic films are transparent and flexible, potentially serving as liquid-repellent surfaces in various applications.