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Universal buckling kinetics in drying nanoparticle-laden droplets on a hydrophobic substrate

Bansal, Lalit and Miglani, Ankur and Basu, Saptarshi (2015) Universal buckling kinetics in drying nanoparticle-laden droplets on a hydrophobic substrate. In: PHYSICAL REVIEW E, 92 (4).

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Official URL: http://dx.doi.org/10.1103/PhysRevE.92.042304

Abstract

We provide a comprehensive physical description of the vaporization, self-assembly, agglomeration, and buckling kinetics of sessile nanofluid droplets pinned on a hydrophobic substrate. We have deciphered five distinct regimes of the droplet life cycle. Regimes I-III consists of evaporation-induced preferential agglomeration that leads to the formation of a unique dome-shaped inhomogeneous shell with a stratified varying-density liquid core. Regime IV involves capillary-pressure-initiated shell buckling and stress-induced shell rupture. Regime V marks rupture-induced cavity inception and growth. We demonstrate through scaling arguments that the growth of the cavity (which controls the final morphology or structure) can be described by a universal function.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 05 Nov 2015 06:51
Last Modified: 05 Nov 2015 06:51
URI: http://eprints.iisc.ernet.in/id/eprint/52677

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