Suspension of Water Droplets on Individual Pillars

T. Tóth, D. Ferraro, E. Chiarello, M. Pierno, G. Mistura, Giuliano Bissacco, C. Semprebon

    Research output: Contribution to journalJournal articleResearchpeer-review


    We report results of extensive experimental and numerical studies on the suspension of water drops deposited on cylindrical pillars having circular and square cross sections and different wettabilities. In the case of circular pillars, the drop contact line is pinned to the whole edge contour until the drop collapses due to the action of gravity. In contrast, on square pillars, the drops are suspended on the four corners and spilling along the vertical walls is observed. We have also studied the ability of the two geometries to sustain drops and found that if we compare pillars with the same characteristic size, the square is more efficient in pinning large volumes, while if we normalize the volumes to pillar areas, the opposite is true.
    Original languageEnglish
    Issue number8
    Pages (from-to) 4742–4748
    Publication statusPublished - 2011

    Bibliographical note

    © 2011 American Chemical Society


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