Spreading of mercury droplets on thin silver films at room temperature

Avraham Be'er, Yossi Lereah, Aviad Frydman, Haim Taitelbaum

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We study the spreading characteristics of a reactive-wetting system of mercury (Hg) droplets on silver (Ag) films in room temperature. This is done using our recently developed method for reconstructing the dynamical three-dimensional shape of spreading droplets from two-dimensional microscope images. We study the time evolution of the droplet radius and its contact angle, and find that the spreading process consists of two stages: (i) the "bulk propagation" regime, controlled by chemical reaction on the surface, and (ii) the "fast-flow" regime, which occurs within the metal film as well as on the surface and consists of both reactive and diffusive propagation. We show that the transition time between the two main time regimes depends solely on the thickness of the Ag film. We also discuss the chemical structure of the intermetallic compound formed in this process.

Original languageEnglish
Article number051601
JournalPhysical Review E
Volume75
Issue number5
DOIs
StatePublished - 2 May 2007
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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