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Interfacial Crystallization within Liquid Marbles
Version 1
: Received: 25 September 2020 / Approved: 25 September 2020 / Online: 25 September 2020 (15:30:00 CEST)
A peer-reviewed article of this Preprint also exists.
Bormashenko, E.; Roy, P.K.; Shoval, S.; Legchenkova, I. Interfacial Crystallization within Liquid Marbles. Condens. Matter 2020, 5, 62. Bormashenko, E.; Roy, P.K.; Shoval, S.; Legchenkova, I. Interfacial Crystallization within Liquid Marbles. Condens. Matter 2020, 5, 62.
Abstract
We report interfacial crystallization in droplets of saline solutions placed on superhydrophobic surfaces and liquid marbles filled with the saline. Evaporation of saline droplets deposited on superhydrophobic surface resulted in the formation of cup-shaped millimeter-scaled residues. The formation of the cup-like deposit is reasonably explained within the framework of the theory of the coffee-stain effect, namely, the rate of heterogeneous crystallization along the contact line of the droplet is many times higher than in the droplet bulk. Crystallization within evaporated saline marbles, coated with lycopodium particles, depends strongly on the evaporation rate. Rapidly evaporated saline marbles yielded dented shells built of a mixture of colloidal particles and NaCl crystals. We relate the formation of these shells to the interfacial crystallization promoted by hydrophobic particles coating the marbles, accompanied with the upward convection flows supplying the saline to the particles, serving as the centers of interfacial crystallization. Convective flows prevail over the diffusion mass transport for the saline marbles heated from below.
Keywords
interfacial crystallization; liquid marble, hydrophobic particle; superhydrophobic surface; coffee-stain effect.
Subject
Physical Sciences, Condensed Matter Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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