[Todos] Coloquios DF - Hendrik Hölscher (KIT), Jueves 17/11, 14hs, Aula Seminario, 2do piso, Pab. I

[Augusto Roncaglia]

COLOQUIOS DEL DEPARTAMENTO DE F�SICA FCEYN - UBA


              En el Aula Seminario, 2do piso, Pab. I,

              Jueves 17/11, 14hs:

              HENDRIK HÖLSCHER

              Karlsruhe Institute of Technology


*Nano- and microstructured Surfaces Inspired by Geckos, Butterflies,
Beetles, and Water Ferns*

Fascinating properties of many surfaces found in nature originate from
nano- and microstructures covering them. With the help of these smart
surfaces many animals and plants adapt in an optimal way to their
environment. The well-known hierarchical nano-scale hairs at the toes of
geckos show high adhesion and self-cleaning abilities at the same time. The
blue Morpho butterfly developed “Christmas�-tree like nanostructures to
obtain a high reflection of blue light for extremely wide view angles. The
air retaining water beetle is an inspiration to develop drag reducing
surfaces while high aspect ratio fur-like microhairs found on the water
plant Salvinia can be used to clean oil/water mixtures. These and other
features of surfaces observed in nature can be mimicked to design smart
surfaces which are useful for various technological applications ranging
from non-bleaching colors to self-cleaning, adhesive surfaces and oil/water
separation. Advanced technologies have to be applied to fabricate these
bio-inspired nano- and microstructures. Since e-beam lithography and 3D
direct laser writing are only suited for research purposes we develop hot
embossing and pulling methods for large scale fabrication. In this talk I
will present our recent developments of bio-inspired smart surfaces
mimicking the features of butterflies, geckos, beetles, and water plants.
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