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Issue 8, 2021
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Stabilizing liquid drops in nonequilibrium shapes by the interfacial crosslinking of nanoparticles

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Abstract

Droplets are spherical due to the principle of interfacial energy minimization. Here, we show that nonequilibrium droplet shapes can be stabilized via the interfacial self-assembly and crosslinking of nanoparticles. This principle allows for the stability of practically infinitely long liquid tubules and monodisperse cylindrical droplets. Droplets of oil-in-water are elongated via gravitational or hydrodynamic forces at a reduced interfacial tension. Silica nanoparticles self-assemble and cross-link on the interface triggered by the synergistic surface modification with hexyltrimethylammonium- and trivalent lanthanum-cations. The droplet length dependence is described by a scaling relationship and the rate of nanoparticle deposition on the droplets is estimated. Our approach potentially enables the 3D-printing of Newtonian Fluids, broadening the array of material options for additive manufacturing techniques.

Graphical abstract: Stabilizing liquid drops in nonequilibrium shapes by the interfacial crosslinking of nanoparticles

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Supplementary files

Article information


Submitted
28 Nov 2020
Accepted
07 Jan 2021
First published
07 Jan 2021

This article is Open Access

Soft Matter, 2021,17, 2034-2041
Article type
Paper

Stabilizing liquid drops in nonequilibrium shapes by the interfacial crosslinking of nanoparticles

M. A. Khan and M. F. Haase, Soft Matter, 2021, 17, 2034
DOI: 10.1039/D0SM02120B

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