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Journal Articles Soft Matter Year : 2016

Exploiting non-equilibrium phase separation for self-assembly

Abstract

Demixing can occur in systems of two or more particle species that experience different driving forces, e.g., mixtures of self-propelled active particles or of oppositely charged colloids subject to an electric field. Here we show with macroscopic experiments and computer simulations that the forces underlying such non-equilibrium segregation can be used to control the self-assembly of particles that lack attractive interactions. We demonstrate that, depending on the direction, amplitude and frequency of a periodic external force acting on one particle species, the structures formed by a second, undriven species can range from compact clusters to elongated, string-like patterns.

Dates and versions

hal-02405657 , version 1 (11-12-2019)

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Michael Grünwald, Simon Tricard, George Whitesides, Phillip Geissler. Exploiting non-equilibrium phase separation for self-assembly. Soft Matter, 2016, 12 (5), pp.1517-1524. ⟨10.1039/C5SM01922B⟩. ⟨hal-02405657⟩

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