Karpitschka S, Hanske C, Fery A, Riegler H (2014)
Publication Type: Journal article
Publication year: 2014
Book Volume: 30
Pages Range: 6826-6830
Journal Issue: 23
DOI: 10.1021/la500459v
Due to capillarity, sessile droplets of identical liquids will instantaneously fuse when they come in contact at their three-phase lines. However, with drops of different, completely miscible liquids, instantaneous coalescence can be suppressed. Instead, the drops remain in a state of noncoalescence for some time, with the two drop bodies connected only by a thin neck. The reason for this noncoalescence is the surface tension difference, Δγ, between the liquids. If Δγ is sufficiently large, then it induces a sufficiently strong Marangoni flow, which keeps the main drop bodies temporarily separated. Studies with spreading drops have revealed that the boundary between instantaneous coalescence and noncoalescence is sharp (Karpitschka, S.; Riegler, H. J. Fluid. Mech. 2014, 743, R1). The boundary is a function of two parameters only: Δγ and ⊖
APA:
Karpitschka, S., Hanske, C., Fery, A., & Riegler, H. (2014). Coalescence and noncoalescence of sessile drops: Impact of surface forces. Langmuir, 30(23), 6826-6830. https://dx.doi.org/10.1021/la500459v
MLA:
Karpitschka, Stefan, et al. "Coalescence and noncoalescence of sessile drops: Impact of surface forces." Langmuir 30.23 (2014): 6826-6830.
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