title: Facile Fabrication of Superomniphobic Polymer Hierarchical Structures for Directional Droplet Movement.
abstract: We report a facile method for fabricating polymer hierarchical structures, which are the engineered, ratchet-like microscale structures with nanoscale dimples, for the directional movement of droplets. The fabricated polymer hierarchical structures with no surface modifier show hydrophobic, superhydrophobic, or omniphobic characteristics depending on their intrinsic polymer properties. Further treatment with a surface modifier endows the polymer surfaces with superomniphobicity. The fabricated polymer substrates with no surface modifier enable the movement of the water droplet along the designed track at almost no inclination of the substrate.
authors.affiliation: School of Mechanical Engineering, Hanyang University , Seoul, 133-791, Korea.
authors.forename: Hanmin
authors.identifier: http://orcid.org/0000-0002-7724-4244
authors.initials: H
authors.lastname: Jang
authors.affiliation: School of Mechanical Engineering, Hanyang University , Seoul, 133-791, Korea.
authors.forename: Heung Soo
authors.identifier: http://orcid.org/0000-0002-9393-0121
authors.initials: HS
authors.lastname: Lee
authors.affiliation: School of Mechanical Engineering, Hanyang University , Seoul, 133-791, Korea.
authors.forename: Kwan-Soo
authors.identifier: http://orcid.org/0000-0003-0463-8514
authors.initials: KS
authors.lastname: Lee
authors.affiliation: School of Mechanical Engineering, Hanyang University , Seoul, 133-791, Korea.
authors.forename: Dong Rip
authors.identifier: http://orcid.org/0000-0001-6398-9483
authors.initials: DR
authors.lastname: Kim
keywords: directional movement; hierarchical structure; nano- and microstructures; superhydrophobicity; superomniphobicity; water transport