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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.9b02294
|2 doi
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|a pubmed24n1004.xml
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|a DE-627
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|a eng
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| 100 |
1 |
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|a Jiang, Xin
|e verfasserin
|4 aut
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| 245 |
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|a Sessile Microdrop Coalescence on Partial Wetting Surfaces
|b Effects of Surface Wettability and Stiffness
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|c 2019
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 04.03.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We experimentally investigated the coalescence of two sessile microdrops on rigid surfaces with diverse wettability (macroscopic apparent water contact angles of θapp ≈ 13-110°) and on hydrophobic surfaces (θapp ≈ 110-124°) with very different stiffness properties (Young's moduli of E ≈ 1.1 MPa to 130 GPa). We show that the coalescence contains two fast regimes, in which a liquid meniscus bridging the parent droplets rapidly grows, forming a hemi-ellipsoidal droplet, and a slow regime, in which the merged hemi-ellipsoidal droplet relaxes to the equilibrium hemispherical cap. Whereas the fast bridging regimes last less than 2 ms and are almost independent of surface wettability and stiffness, the relaxation regime, which was only observed on sufficiently hydrophobic and rigid surfaces with low wetting hysteresis, continues for a few tens to several hundreds of milliseconds depending on surface properties. We further demonstrate that the slow droplet relaxation can be described neither by the bulk hydrodynamics nor by a microscopic model concerning liquid evaporation near the droplet edge, but by the molecular kinetic theory for the motion of the three-phase contact line
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|a Journal Article
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|a Zhao, Binyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Longquan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 35(2019), 40 vom: 08. Okt., Seite 12955-12961
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:35
|g year:2019
|g number:40
|g day:08
|g month:10
|g pages:12955-12961
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|u http://dx.doi.org/10.1021/acs.langmuir.9b02294
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