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  Tunable self-healing of magnetically propelling colloidal carpets

Massana-Cid, H., Meng, F., Matsunaga, D., Golestanian, R., & Tierno, P. (2019). Tunable self-healing of magnetically propelling colloidal carpets. Nature Communications, 10(1): 2444. doi:10.1038/s41467-019-10255-4.

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Massana-Cid, H., Autor
Meng, Fanlong1, Autor           
Matsunaga, D., Autor
Golestanian, Ramin1, Autor                 
Tierno, P., Autor
Affiliations:
1Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2570692              

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 Zusammenfassung: The process of crystallization is difficult to observe for transported, out-of-equilibrium systems, as the continuous energy injection increases activity and competes with ordering. In emerging fields such as microfluidics and active matter, the formation of long-range order is often frustrated by the presence of hydrodynamics. Here we show that a population of colloidal rollers assembled by magnetic fields into large-scale propelling carpets can form perfect crystalline materials upon suitable balance between magnetism and hydrodynamics. We demonstrate a field-tunable annealing protocol based on a controlled colloidal flow above the carpet that enables complete crystallization after a few seconds of propulsion. The structural transition from a disordered to a crystalline carpet phase is captured via spatial and temporal correlation functions. Our findings unveil a novel pathway to magnetically anneal clusters of propelling particles, bridging driven systems with crystallization and freezing in material science.

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Sprache(n): eng - English
 Datum: 2019-06-04
 Publikationsstatus: Online veröffentlicht
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1038/s41467-019-10255-4
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Titel: Nature Communications
Genre der Quelle: Zeitschrift
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Seiten: 8 Band / Heft: 10 (1) Artikelnummer: 2444 Start- / Endseite: - Identifikator: -