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oai:recercat.cat:2445/1433242025-12-04T20:45:04Zcom_2072_1057col_2072_478822col_2072_478917

Collective dynamics and conformal ordering in electrophoretically driven nematic colloids Straube, Arthur V. Pagès Casas, Josep M. Tierno, Pietro Ignés i Mullol, Jordi Sagués i Mestre, Francesc Col·loides Electroforesi Colloids Electrophoresis We present a theoretical framework to understand the collective dynamics of an ensemble of electrophoret-ically driven colloidal particles that are forced to assemble around a single topological defect in a nematicliquid crystal by an alternating current electric field. Our generic model combines phoretic propulsion withelectrostatic interactions and liquid-crystal-mediated hydrodynamics, which are effectively cast into a long-rangeinterparticle repulsion, while nematic elasticity plays a subdominant role. Simulations based on this modelfully capture the collective organization process observed in the experiments and other striking effects as theemergence of conformal ordering and a nearly frequency-independent repulsive interaction above 10 Hz. Ourresults demonstrate the importance of hydrodynamic interactions on the assembly of driven microscale matter inanisotropic media. 2019-10-29T10:34:30Z 2019-10-29T10:34:30Z 2019-09-30 2019-10-29T10:34:30Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2643-1564 https://hdl.handle.net/2445/143324 692231 eng Reproducció del document publicat a: https://doi.org/10.1103/PhysRevResearch.1.022008 Physical Review Research, 2019, vol. 1, num. 2, p. 022008 https://doi.org/10.1103/PhysRevResearch.1.022008 info:eu-repo/grantAgreement/EC/H2020/811234/EU//ENFORCE cc-by (c) Straube, Arthur et al., 2019 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess application/pdf American Physical Society Articles publicats en revistes (Física de la Matèria Condensada)