Determine the droplet radius used in Öner and McCarthy (2000) ultrahydrophobic surface experiments

Determine the precise droplet radius employed by Didem Öner and Thomas J. McCarthy in their Langmuir (2000) study on ultrahydrophobic surfaces (“Ultrahydrophobic Surfaces. Effects of Topography Length Scales on Wettability”), so that the droplet-size-to-surface-column-width ratio reported there can be quantitatively established and directly compared with the many-body dissipative particle dynamics simulations of water droplet impacts on nanostructured surfaces conducted in this paper.

Background

In the Discussion, the authors analyze an intermediate wetting state that does not conform to the classical Cassie or Wenzel descriptions. They compare their mesoscale simulation parameters—specifically the ratio of droplet radius to surface feature dimensions—with experimental regimes reported in the literature.

To contextualize the observed intermediate states, they cite Öner and McCarthy’s Langmuir (2000) work on ultrahydrophobic surfaces, where droplet radius and column spacing are central to the wetting behavior. However, the authors explicitly state that the exact droplet radius used in that paper is not known to them, which hinders precise quantitative comparison of ratios (e.g., droplet radius to column width) and interpretation of differences between experimental and simulation regimes.