Self-organized dip-coating patterns of simple, partially wetting, nonvolatile liquids

@article{Tewes2019SelforganizedDP,
  title={Self-organized dip-coating patterns of simple, partially wetting, nonvolatile liquids},
  author={Walter Tewes and Markus Wilczek and Svetlana V. Gurevich and Uwe Thiele},
  journal={Physical Review Fluids},
  year={2019}
}
When a solid substrate is withdrawn from a bath of simple, partially wetting, nonvolatile liquid, one typically distinguishes two regimes, namely, after withdrawal the substrate is macroscopically dry or homogeneously coated by a liquid film. In the latter case, the coating is called a Landau-Levich film. Its thickness depends on the angle and velocity of substrate withdrawal. We predict by means of a numerical and analytical investigation of a hydrodynamic thin-film model the existence of a… 
8 Citations
Dip-coating flow in the presence of two immiscible liquids
Abstract Dip coating is a common technique used to cover a solid surface with a thin liquid film, the thickness of which was successfully predicted by the theory developed in the 1940s by Landau &
Pattern Formation in Slot-Die Coating
We experimentally study the occurrence of pattern formation during the slot-die coating of low-viscosity nearly Newtonian liquids onto Polyethylenterephthalat (PET)-substrates. In particular, it is
Bifurcation study for a surface-acoustic-wave-driven meniscus
A thin-film model for a meniscus driven by Rayleigh surface acoustic waves (SAW) is analysed, a problem closely related to the classical Landau-Levich or dragged-film problem where a plate is
How water wets and self-hydrophilizes nanopatterns of physisorbed hydrocarbons.
Disjoining-pressure-induced acceleration of mass shedding in solid-state dewetting.
TLDR
Two-dimensional simulations indicate that, within the range of thicknesses that the system has studied and for isotropic dynamics, the transversal instability of a straight front does not lead to fingering, and mass shedding is the dominant instability of the dewetting front.
Localized states in coupled Cahn–Hilliard equations
The classical Cahn–Hilliard (CH) equation corresponds to a gradient dynamics model that describes phase decomposition in a binary mixture. In the spinodal region, an initially homogeneous state

References

SHOWING 1-10 OF 172 REFERENCES
Dip-coating with prestructured substrates: transfer of simple liquids and Langmuir-Blodgett monolayers.
TLDR
It is shown how prestructure stripes parallel to the transfer direction lead to the formation of bent stripes in the surfactant coverage after transfer and present similar experimental results.
Film deposition and transition on a partially wetting plate in dip coating
We investigate the entrainment of liquid films on a partially wetting plate vertically withdrawn from a reservoir of viscous liquid using a combination of diffuse-interface numerical simulation and
Self-patterning induced by a solutal Marangoni effect in a receding drying meniscus
This paper examines through numerical simulations the impact of a solutal Marangoni effect on the deposit obtained from a polymer solution. A hydrodynamical model with lubrication approximation is
Avoided critical behavior in dynamically forced wetting.
TLDR
This Letter demonstrates experimentally and theoretically that the dynamical wetting transition at which a liquid film gets deposited by withdrawing a vertical plate out of a liquid reservoir is due to the formation of a solitary wave well below the critical point.
Modelling of driven free surface liquid films
In several types of coating processes a solid substrate is removed at a controlled velocity U from a liquid bath. The shape of the liquid meniscus and the thickness of the coating layer depend on U.
Rayleigh and depinning instabilities of forced liquid ridges on heterogeneous substrates.
TLDR
Depinning of two-dimensional liquid ridges and three-dimensional drops on an inclined substrate is studied within the lubrication approximation using a combination of direct numerical simulation and branch-following techniques.
Modelling the formation of structured deposits at receding contact lines of evaporating solutions and suspensions
When a film of a liquid suspension of nanoparticles or a polymer solution is deposited on a surface, it may dewet from the surface and as the solvent evaporates the solute particles/polymer can be
Continuous and discontinuous dynamic unbinding transitions in drawn film flow.
TLDR
Using a long-wave mesoscopic hydrodynamic description that incorporates wettability via a Derjaguin (disjoining) pressure, four qualitatively different dynamic transitions between microscopic and macroscopic coatings are identified that are out-of-equilibrium equivalents of known equilibrium unbinding transitions.
Electrowetting-induced oil film entrapment and instability.
TLDR
This work finds that a thin film of oil is entrapped under the drop and becomes unstable under the competing effects of the electrostatic pressure and surface tension and dewets into microscopic droplets, in agreement with a linear stability analysis.
...
...