Micro pancakes

A fundamental issue in fluid dynamics concerns how a substrate wets and dewets.  Immersing a hydrophobic substrate in water can lead to the creation of micropancakes.  These gassy layers are 1-2nm in height, but extend laterally for microns.  Moreover, they grow in time, and can also rearrange shape.  The presence of the micropancakes corresponds to a zero-wetted region on the substrate, and subsequent micropancake growth corresponds to dynamic dewetting.

Our research spans experimental, numerical, and theoretical disciplines.  In particular, we are investigating: 

  1. The dynamic growth and rearrangement as a function of substrate and saturated gas types, and
  2. the internal structure (if any) of the micropancakes.

The ultimate aims are to understand the behaviour of gas-liquid-substrate interactions at the nanoscale, as well as their connection with the formation of surface nanobubbles.


Figure 1: Example of micropancake imaged with Atomic Force Microscopy. The image is 1.4 µm wide.

Info: Detlef Lohse

Researchers: Joost WeijsHanneke GelderblomJames SeddonSiddartha DasDetlef LohseAndrea ProsperettiJacco Snoeijer
Collaborators: Olesya Bliznyuk, Stefan Kooij, Bene Poelsema and Harold Zandvliet (Solid State Physics, U Twente)
Embedding: MESA+, JMBC
Sponsors: FOM, EEC

 


Max Planck Gesellschaft

MCEC

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