Straube, Arthur V.Pagès Casas, Josep M.Tierno, PietroIgnés i Mullol, JordiSagués i Mestre, Francesc2019-10-292019-10-292019-09-302643-1564https://hdl.handle.net/2445/143324We 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.application/pdfengcc-by (c) Straube, Arthur et al., 2019http://creativecommons.org/licenses/by/3.0/esCol·loidesElectroforesiColloidsElectrophoresisinfo:eu-repo/semantics/article6922312019-10-29info:eu-repo/semantics/openAccess