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Issue 10, 2018
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Interaction anisotropy and the KPZ to KPZQ transition in particle deposition at the edges of drying drops

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Abstract

The deposition process at the edge of evaporating colloidal drops varies with the shape of suspended particles. Experiments with prolate ellipsoidal particles suggest that the spatiotemporal properties of the deposit depend strongly on particle aspect ratio. As the aspect ratio increases, the particles form less densely-packed deposits and the statistical behavior of the deposit interface crosses over from the Kardar–Parisi–Zhang (KPZ) universality class to another universality class which was suggested to be consistent with the KPZ plus quenched disorder. Here, we numerically study the effect of particle interaction anisotropy on deposit growth. In essence, we model the ellipsoids, at the interface, as disk-like particles with two types of interaction patches that correspond to specific features at the poles and equator of the ellipsoid. The numerical results corroborate experimental observations and further suggest that the deposition transition can stem from interparticle interaction anisotropy. Possible extensions of our model to other systems are also discussed.

Graphical abstract: Interaction anisotropy and the KPZ to KPZQ transition in particle deposition at the edges of drying drops

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Publication details

The article was received on 29 Oct 2017, accepted on 15 Feb 2018 and first published on 16 Feb 2018


Article type: Paper
DOI: 10.1039/C7SM02136D
Citation: Soft Matter, 2018,14, 1903-1907
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    Interaction anisotropy and the KPZ to KPZQ transition in particle deposition at the edges of drying drops

    C. S. Dias, P. J. Yunker, A. G. Yodh, N. A. M. Araújo and M. M. Telo da Gama, Soft Matter, 2018, 14, 1903
    DOI: 10.1039/C7SM02136D

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