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Dry under water: air retaining properties of large-scale elastomer foils covered with mushroom-shaped surface microstructures

Mail, Matthias 1,2; Walheim, Stefan 1,2; Schimmel, Thomas 1,2; Barthlott, Wilhelm; Gorb, Stanislav N.; Heepe, Lars
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)


Superhydrophobic surfaces are well known for most different functions in plants, animals, and thus for biomimetic technical applications. Beside the Lotus Effect, one of their features with great technical, economic and ecologic potential is the Salvinia Effect, the capability to keep a stable air layer when submerged under water. Such air layers are of great importance, e.g., for drag reduction (passive air lubrication), antifouling, sensor applications or oil–water separation. Some biological models, e.g., the floating fern Salvinia or the backswimmer Notonecta, show long term stable air retention even under hydrodynamic conditions. Therefore, they are ideal models for the development of technical biomimetic air retaining surfaces. Up to now, several prototypes of such surfaces have been developed, but none provides both, stable air retention and cost effective large scale production. Meanwhile, a novel biomimetic surface is commercially available and produced on a large scale: an adhesive elastomeric film with mushroom-shaped surface microstructures that mimic the adhesion system of animals. In this study, we show that these films, which have been initially developed for a different purpose, due to their specific geometry at the microscale, are capable of stable air retention under water. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000154882
Veröffentlicht am 20.01.2023
DOI: 10.3762/bjnano.13.113
Zitationen: 2
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 2190-4286
KITopen-ID: 1000154882
HGF-Programm 43.31.02 (POF IV, LK 01) Devices and Applications
Erschienen in Beilstein Journal of Nanotechnology
Verlag Beilstein-Institut
Band 13
Seiten 1370–1379
Vorab online veröffentlicht am 21.11.2022
Schlagwörter adhesive tape; air layer; air retention; bionics; fouling; gecko tape; mushroom structures; passive air lubrication; Salvinia effect; superhydrophobicity; KNMFi proposal 2018-019-021569 FIB
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