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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/143324
Collective dynamics and conformal ordering in electrophoretically driven nematic colloids
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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.
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STRAUBE, Arthur V., et al. Collective dynamics and conformal ordering in electrophoretically driven nematic colloids. Physical Review Research. 2019. Vol. 1, num. 2, pags. 022008. ISSN 2643-1564. [consulted: 15 of October of 2026]. Available at: https://hdl.handle.net/2445/143324