Effect of Surface Nano-Texturing on Wetting Properties: Molecular Dynamics Study

  • M. Aleksandrovych Universit´e de Lorraine, CNRS, LEMTA, Faculty of Physics, Taras Shevchenko National University of Kyiv
  • G. Castanet Universit´e de Lorraine, CNRS, LEMTA
  • S. Burian Faculty of Physics, Taras Shevchenko National University of Kyiv
  • F. Lemoine Universit´e de Lorraine, CNRS, LEMTA
  • D. Lacroix Universit´e de Lorraine, CNRS, LEMTA
  • M. Isaiev Universit´e de Lorraine, CNRS, LEMTA
Keywords: solid/fluid interface, wetting, nanostructured surface, molecular dynamics

Abstract

Molecular dynamics simulations describing the equilibrium shape of a nanodroplet located on the solid substrate are presented for the cases of a “cylindrical water droplet” on silicon substrates. Several examples of the structuration of the solid substrate surface are simulated, i.e.: atomistic flat substrate and substrates with ordered nanopillars and nanopores. The adhesives forces between molecules of the substrate and the fluid are modified to change the wettability. Three wetting configurations are considered in this work for the smooth surface: (i) hydrophilic (0 = 30∘), (ii) hydrophobic (0 = 136∘), and (iii) an intermediate regime (0 = 80∘). Further, the dependence of the wetting angle as a function of the surface state is studied in details for the above-mentioned configurations.

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Published
2020-08-26
How to Cite
Aleksandrovych, M., Castanet, G., Burian, S., Lemoine, F., Lacroix, D., & Isaiev, M. (2020). Effect of Surface Nano-Texturing on Wetting Properties: Molecular Dynamics Study. Ukrainian Journal of Physics, 65(9), 817. https://doi.org/10.15407/ujpe65.9.817
Section
Surface physics