Evaporation-Triggered Segregation of Sessile Binary Droplets

Yaxing Li, Pengyu Lv, Christian Diddens, Huanshu Tan, Herman Wijshoff, Michel Versluis, Detlef Lohse (Corresponding Author)

Research output: Contribution to journalArticleAcademicpeer-review

53 Citations (Scopus)
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Droplet evaporation of multicomponent droplets is essential for various physiochemical applications, e.g. in inkjet printing, spray cooling and microfabrication. In this work, we observe and study phase segregation of an evaporating sessile binary droplet, consisting of a mixture of water and a surfactant-like liquid (1,2-hexanediol). The phase segregation (i.e., demixing) leads to a reduced water evaporation rate of the droplet and eventually the evaporation process ceases due to shielding of the water by the non-volatile 1,2-hexanediol. Visualizations of the flow field by particle image velocimetry and numerical simulations reveal that the timescale of water evaporation at the droplet rim is faster than that of the Marangoni flow, which originates from the surface tension difference between water and 1,2-hexanediol, eventually leading to segregation.
Original languageEnglish
Article number224501
JournalPhysical review letters
Issue number22
Publication statusPublished - 1 Jun 2018


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  • Evaporating Multicomponent Droplets

    Li, Y., 26 Jun 2020, Enschede: University of Twente. 152 p.

    Research output: ThesisPhD Thesis - Research UT, graduation UT

    Open Access
    343 Downloads (Pure)

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