1 Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany.
2 Faculty of Life Sciences, Rhine-Waal University of Applied Sciences, D-47533 Kleve, Germany.
3 Plant Biomechanics Group, Botanic Garden, Faculty of Biology, University of Freiburg, Schänzlestrasse 1, D-79104 Freiburg, Germany.
4 FIT, Freiburg Center for Interactive Materials and Bioinspired Technologies, Georges-Köhler-Allee 105, D-79110 Freiburg, Germany.
5 FMF, Freiburg Materials Research Center, Stefan-Meier-Strasse 21, D-79104 Freiburg, Germany.
6 Centre for Biomimetic and Natural Technologies, Faculty of Technology and Bionics, Rhine-Waal University of Applied Sciences, Marie-Curie-Str. 1, D-47533 Kleve, Germany.
7 Department of Functional Morphology and Biomechanics, Institute of Zoology, Christian-Albrechts-University of Kiel, Am Botanischen Garten 1-9, D-24118 Kiel, Germany.