Title:
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Tunable self-healing of magnetically propelling colloidal carpets
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Author:
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Massana Cid, Helena; Meng, Fanlong; Matsunaga, Daiki; Golestanian, Ramin; Tierno, Pietro
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Other authors:
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Universitat de Barcelona |
Abstract:
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The process of crystallization is difficult to observe for transported, out-of-equilibrium sys-tems, as the continuous energy injection increases activity and competes with ordering. Inemergingfields such as microfluidics and active matter, the formation of long-range order isoften frustrated by the presence of hydrodynamics. Here we show that a population ofcolloidal rollers assembled by magneticfields into large-scale propelling carpets can formperfect crystalline materials upon suitable balance between magnetism and hydrodynamics.We demonstrate afield-tunable annealing protocol based on a controlled colloidalflow abovethe carpet that enables complete crystallization after a few seconds of propulsion. Thestructural transition from a disordered to a crystalline carpet phase is captured via spatial andtemporal correlation functions. Ourfindings unveil a novel pathway to magnetically annealclusters of propelling particles, bridging driven systems with crystallization and freezing inmaterial science. |
Subject(s):
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-Col·loides -Propietats magnètiques -Cristal·lització -Hidrodinàmica -Colloids -Magnetic properties -Crystallization -Hydrodynamics |
Rights:
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cc-by (c) Massana Cid, Helena et al., 2019
http://creativecommons.org/licenses/by/3.0/es |
Document type:
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Article Article - Published version |
Published by:
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Nature Publishing Group
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