How water droplets evaporate on a superhydrophobic substrate

Hanneke Gelderblom, Álvaro G. Marín, Hrudya Nair, Arie van Houselt, Leon Lefferts, Jacco H. Snoeijer, Detlef Lohse

Research output: Contribution to journalArticleAcademicpeer-review

144 Citations (Scopus)

Abstract

Evaporation of water droplets on a superhydrophobic substrate, on which the contact line is pinned, is investigated. While previous studies focused mainly on droplets with contact angles smaller than 90°, here we analyze almost the full range of possible contact angles (10°-150 °). The greater contact angles and pinned contact lines can be achieved by use of superhydrophobic carbon nanofiber substrates. The time evolutions of the contact angle and the droplet mass are examined. The experimental data are in good quantitative agreement with the model presented by Popov [Phys. Rev. EPLEEE81539-375510.1103/PhysRevE.71.036313 71, 036313 (2005)], demonstrating that the evaporation process is quasistatic, diffusion-driven, and that thermal effects play no role. Furthermore, we show that the experimental data for the evolution of both the contact angle and the droplet mass can be collapsed onto one respective universal curve for all droplet sizes and initial contact angles.

Original languageEnglish
Article number026306
Number of pages6
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume83
Issue number2
DOIs
Publication statusPublished - 17 Feb 2011
Externally publishedYes

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