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Phase Transitions of Oppositely Charged Colloidal Particles Driven by Alternating Current Electric Field
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).ORCID-id: 0000-0003-3393-7257
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Rekke forfattare: 72021 (engelsk)Inngår i: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 15, nr 2, s. 2363-2373Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We study systems containing oppositely charged colloidal particles under applied alternating current electric fields (AC fields) using overdamped Langevin dynamics simulations in three dimensions. We obtain jammed bands perpendicular to the field direction under intermediate frequencies and lanes parallel with the field under low frequencies. These structures also depend upon the particle charges. The pathway for generating jammed bands follows a stepwise mechanism, and intermediate bands are observed during lane formation in some systems. We investigate the component of the pressure tensors in the direction parallel to the field and observe that the jammed to lane transition occurs at a critical value for this pressure. We also find that the stable steady states appear to satisfy the principle of maximum entropy production. Our results may help to improve the understand of the underlying mechanisms for these types of dynamic phase transitions and the subsequent cooperative assemblies of colloidal particles under such non-equilibrium conditions.

sted, utgiver, år, opplag, sider
2021. Vol. 15, nr 2, s. 2363-2373
Emneord [en]
colloidal particles, phase transition, alternating current electric field, overdamped Langevin simulation, non-equilibrium thermodynamics
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Identifikatorer
URN: urn:nbn:se:su:diva-192437DOI: 10.1021/acsnano.0c04095ISI: 000623061800027PubMedID: 33576616OAI: oai:DiVA.org:su-192437DiVA, id: diva2:1546772
Tilgjengelig fra: 2021-04-23 Laget: 2021-04-23 Sist oppdatert: 2022-03-23bibliografisk kontrollert

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Wang, Yong-LeiGao, YangyangForsman, Jan

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