title: Bioinspired holographically featured superhydrophobic and supersticky nanostructured materials.
abstract: In this Letter, we present an intriguing method for fabricating polymeric superhydrophobic surfaces by reactive-ion etching of holographically featured three-dimensional structures. Using the proposed strategy, we generated both lotus and gecko surfaces by simply controlling the incident angle of the laser beam during holographic lithography. The adhesion force of the gecko-state superhydrophobic surfaces was the highest yet reported for an artificial superhydrophobic surface. The well-controlled patterns enable an in-depth understanding of superhydrophobic and superadhesive surfaces. In particular, the present observations provide direct evidence of a high adhesive force resulting from surface-localized wetting, which is quite different from previously suggested mechanisms.
authors.affiliation: National Creative Research Initiative Center for Integrated Optofluidic Systems, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon, 305-701 Korea.
authors.forename: Sung-Gyu
authors.initials: SG
authors.lastname: Park
authors.forename: Jun Hynk
authors.initials: JH
authors.lastname: Moon
authors.forename: Seung-Kon
authors.initials: SK
authors.lastname: Lee
authors.forename: Jaewon
authors.initials: J
authors.lastname: Shim
authors.forename: Seung-Man
authors.initials: SM
authors.lastname: Yang
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry*; D032701:Biomimetics; D006696:Holography; D057927:Hydrophobic and Hydrophilic Interactions; D007834:Lasers; D044085:Microfluidics; D049329:Nanostructures / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D013499:Surface Properties
chemical_list: D011108:Polymers