Active droploids

Jens Grauer, Falko Schmidt, Jesús Pineda, Benjamin Midtvedt, Hartmut Löwen, Giovanni Volpe and Benno Liebchen ()
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Jens Grauer: Heinrich-Heine-Universität Düsseldorf
Falko Schmidt: University of Gothenburg
Jesús Pineda: University of Gothenburg
Benjamin Midtvedt: University of Gothenburg
Hartmut Löwen: Heinrich-Heine-Universität Düsseldorf
Giovanni Volpe: University of Gothenburg
Benno Liebchen: Technische Universität Darmstadt

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Active matter comprises self-driven units, such as bacteria and synthetic microswimmers, that can spontaneously form complex patterns and assemble into functional microdevices. These processes are possible thanks to the out-of-equilibrium nature of active-matter systems, fueled by a one-way free-energy flow from the environment into the system. Here, we take the next step in the evolution of active matter by realizing a two-way coupling between active particles and their environment, where active particles act back on the environment giving rise to the formation of superstructures. In experiments and simulations we observe that, under light-illumination, colloidal particles and their near-critical environment create mutually-coupled co-evolving structures. These structures unify in the form of active superstructures featuring a droplet shape and a colloidal engine inducing self-propulsion. We call them active droploids—a portmanteau of droplet and colloids. Our results provide a pathway to create active superstructures through environmental feedback.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26319-3

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DOI: 10.1038/s41467-021-26319-3

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