Omniphobic surfaces, which repel all liquids, are used in numerous applications, including desalination and drag reduction. Typically, these surfaces exploit perfluorinated chemicals that are expensive, non-biodegrada-ble, and vulnurable to harsh physical conditions. In response, we have recently demonstrated that bio-inspired doubly reentrant microtextures could render even intrinsically wetting surfaces temporarily omniphobic. Currenlty, we are investigating mechanisms underlying time-dependent wetting transitions along with practical applications.
Detlef Lohse (UTwente), Prat Tiwary (UMaryland), Claus-D. Ohl (NTU), Satoshi Habuchi (KAUST)
Domingues, E. M.; Arunachalam, S.; Mishra, H., Doubly Reentrant Cavities Prevent Catastrophic Wetting Transitions on Intrinsically Wetting Surfaces . Acs Appl Mater Inter 2017, 9 (25), 21532-21538.