Flexible and Robust Superomniphobic Surfaces Created by Localized Photofluidization of Azopolymer Pillars

Cited 50 time in webofscience Cited 0 time in scopus
  • Hit : 359
  • Download : 0
Springtails, insects which breathe through their skins, possess mushroom-shaped nanostructures. As doubly re-entrant geometry, in the mushroom-head enhances the resistance against liquid invasion, the springtails have robust, liquid-free omniphobic skins. Although omniphobic surfaces are promising for various applications, it remains an important challenge to mimic the structural feature of springtails. This paper presents a pragniatic method to create doubly re-entrant nanostructures and robust superomniphobic surfaces by exploiting localized photofluidization of azopolymers. Irradiation of circularly polarized light reconfigures azopolymer micropillars to have a mushroom-like head with a doubly re-entrant nanogeometry through protrusion and inward bending of polymer film from the top edge. The light-driven reconfigured micropillars facilitate the pining of triple line as springtails do. In particular, the unique geometry exhibits superomniphobicity even for liquids whose equilibrium contact angles are almost zero in the presence of a practical level of external pressure. In addition, the simple fabrication process is highly reproducible, scalable, and compatible with various substrate materials including flexible polymeric film. Our results suggest that our photofluidization technology will provide a practical route to develop robust superomniphobic surfaces.
Publisher
AMER CHEMICAL SOC
Issue Date
2017-08
Language
English
Article Type
Article
Keywords

AZO POLYMER-FILMS; DIRECTIONAL PHOTOFLUIDIZATION; SUPEROLEOPHOBIC SURFACES; AZOBENZENE MATERIALS; OMNIPHOBIC SURFACES; INVERSE OPALS; TRANSPARENT; COATINGS; FABRICS; LITHOGRAPHY

Citation

ACS NANO, v.11, no.8, pp.7821 - 7828

ISSN
1936-0851
DOI
10.1021/acsnano.7b01783
URI
http://hdl.handle.net/10203/226150
Appears in Collection
MS-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 50 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0