Superomniphobic surfaces generated by microstructuring
The adhesion between fluids and surfaces is caused by various interactions. The most important properties are the surface tension of the liquid and the composition of the surface. We are interested in superhydrophobic surfaces, which repel all kinds of liquids independent from the material of the surface. This is achieved by fabricating periodically arranged microstructures on the surface. The repelling of liquids by microstructures is known as lotus effect, which is further enhanced by using a re-entrant geometry.
To fabricate re-entrant or even re-re-entrant structures a comination of micro- and nanotechnology wiht high precision are used. Superhydrophobic surfaces such as silicon wafers. The next step is the fabrication of flexible substrates with the same water repellent structures that were realized on flat and rigid substrates before. This allows for a number of possible applications for example to reduce the drag of liquids in pipes.
Dipl.-Phys. Steffen Klingel
Current topics for Diploma-, Bachelor-, Masterthesis:
- Condensation in periodically structured surfaces
- Dynamics of electrically excited droplets
- Fabrication of oleophobic polymer substrates
Applied Physics Letters 111(6):061604;(2017)
- "Herstellung einer periodischen, superhydrophoben Säulenstruktur durch Prägung von Polymerschichten"Akira Lentfert, Bachelorarbeit (2017)
- "Untersuchung des Benetzungsverhaltens periodischer Säulenstrukturen mit Hilfe integrierter Hybridbrückenresonatoren"
Steffen Klingel, Diplomarbeit (2015)