Rapid deceleration-driven wetting transition during pendant drop deposition on superhydrophobic surfaces

Hyuk Min Kwon, Adam T. Paxson, Kripa K. Varanasi, Neelesh A. Patankar

Research output: Contribution to journalArticle

132 Scopus citations

Abstract

A hitherto unknown mechanism for wetting transition is reported. When a pendant drop settles upon deposition, there is a virtual "collision" where its center of gravity undergoes rapid deceleration. This induces a high water hammer-type pressure that causes wetting transition. A new phase diagram shows that both large and small droplets can transition to wetted states due to the new deceleration driven and the previously known Laplace mechanisms, respectively. It is explained how the attainment of a nonwetted Cassie-Baxter state is more restrictive than previously known.

Original languageEnglish (US)
Article number036102
JournalPhysical review letters
Volume106
Issue number3
DOIs
StatePublished - Jan 20 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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