A generalized variational approach for predicting contact angles of sessile nano-droplets on both flat and curved surfaces

@article{Jasper2019AGV,
  title={A generalized variational approach for predicting contact angles of sessile nano-droplets on both flat and curved surfaces},
  author={Warren Jasper and Nadish Anand},
  journal={Journal of Molecular Liquids},
  year={2019}
}

Anomalous Temperature-Controlled Concave-Convex Switching of Curved Oil-Water Menisci.

A reversible temperature-tunable concave-convex shape switching in capillary-contained, surfactant-decorated, oil-water interfaces is demonstrated, resulting from a hitherto-unreported sharp reversible hydrophobic-hydrophilic transition of the glass capillary walls.

Effects of fluid–solid interaction strength on wetting of graphite-like substrates by water: density functional theory

We have explored wetting of graphite-like substrates by water using density functional approach for classical associating fluids. The four-site fluid water model without electrostatic interactions

The shape of two-dimensional and three-dimensional drops on flat and curved hydrophilic substrates: variational, numerical and molecular dynamics simulation investigations

In this paper, we analyze the shape of two-dimensional and three-dimensional drops on flat and curved substrates by minimizing free energy with the variational approach. The process initiated from

Hierarchically Textured Oleophobic Internal Coatings that Facilitate Drag Reduction of Viscous Oils in Macroscopic Laminar Flow

For transportation of hydrocarbon liquids via pipelines, reducing the frictional forces between internal walls and viscous oils through modification of the interfacial surface chemistry and

Two- and Three-Dimensional Modelling of Heating and Evaporation Under Steady Conditions

In Chap. 10 we have seen that when an evaporating drop has the shape of a sphere, a spheroid or an ellipsoid, and the boundary conditions are uniform over the drop surface, the whole problem

Wetting of electrospun nylon-11 fibers and mats

Wetting of electrospun mats plays a huge role in tissue engineering and filtration applications. However, it is challenging to trace the interrelation between the wetting of individual nano-sized

The development of a high-performance Ni-superalloy additively manufactured heat pipe

Additively manufacturing (AM) has been used to manufacture fine structures with structured/engineered porosity in heat management devices. In this study, laser powder bed fusion (LPBF) was used to

Microdroplet Actuation via Light Line Optoelectrowetting (LL-OEW)

The possibility to actuate droplets by laser light beams, which traverse the setup parallel to the chip surface and inside the OEW layer sequence, is reported, which is called “light line OEW” (LL-OEW).

References

SHOWING 1-10 OF 27 REFERENCES

Line Tension and Wettability of Nanodrops on Curved Surfaces.

This work studies the formation of nanodrops on curved surfaces by means of molecular dynamics simulations, where the particles interact via a Lennard-Jones potential, and calculates the line tension, namely, by fitting the contact angle for different size drops to the modified Young equation.

On the role of the three-phase contact line in surface deformation.

This study uses superhydrophobic surfaces composed of an array of silicon nanostructures whose Young modulus is 4 orders of magnitude higher than that of surfaces in earlier recorded viscoelastic braking experiments to study deformation of solid surfaces at the three-phase contact line.

Effect of contact line curvature on solid-fluid surface tensions without line tension.

From the observed relation between the contact angle and contact line curvature, the adsorption at theSolid-liquid interface can be determined, as can the surface tensions of the solid-liquid and solid-vapor interfaces.

Conceptual aspects of line tensions.

The formulation provides a clearly defined scheme to determine line properties from measured dependences of the contact angles on lens or drop volumes and shows how these coefficients transform as a function of the relative displacements of the dividing interfaces.

Mixed mode of dissolving immersed nanodroplets at a solid-water interface.

The non-universal dissolution rates of microscopic oil droplets are ascribed to chemical and geometric surface heterogeneities (that lead to contact line pinning) and cooperative effects from the mass exchange among neighbouring droplets.

Line Tension Measurements through Drop Size Dependence of Contact Angle.

It was found that the drop size dependence of contact angles was due to a positive line tension, of the order of 1 µJ/m with a trend toward larger values for higher liquid surface tensions.