Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 38: Poster III: Resistive switching (jointly with DF, KR, HL); Thermoelectric materials (Focused session); Micro- and nanopatterning (jointly with O); Ion irradiation effects

DS 38.39: Poster

Donnerstag, 29. März 2012, 17:30–19:00, Poster E

Hierarchical Fabrication of Gecko-Mimicking Nano- and Microstructures by Hot Embossing and Hot Pulling — •Guénola Etienne, Michael Röhrig, Farid Oulhadj, Marc Schneider, Matthias Worgull, and Hendrik Hölscher — Karlsruher Institut für Technologie, Institut für Mikrostrukturtechnik, Postfach 3640, 76021 Karlsruhe, Deutschland

Hierarchical dry adhesives have been fabricated by hot embossing and hot pulling. Three levels of hierarchy mimic the gecko*s tiny tilted hairs which ramify into smaller structures covering its toes. Gecko-like adhesives offer a large amount of interesting applications, like pick-and-place systems or adhesive bandages inside the human body. However, such products have to be cost-effectively fabricated on large areas. This can be achieved by three-fold hierarchical dry adhesives, fabricated by hot embossing and hot pulling. These techniques enable the large-area fabrication of delicate polymer fibrils with high aspect ratios and diameters in the nanometer range. The fabricated structures are very compliant and achieve a high real contact area even to rough substrates. This causes high adhesion originating from van-der-Waals forces.