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http://hdl.handle.net/2445/143324
Title: | Collective dynamics and conformal ordering in electrophoretically driven nematic colloids |
Author: | Straube, Arthur V. Pagès Casas, Josep M. Tierno, Pietro Ignés i Mullol, Jordi Sagués i Mestre, Francesc |
Keywords: | Col·loides Electroforesi Colloids Electrophoresis |
Issue Date: | 30-Sep-2019 |
Publisher: | American Physical Society |
Abstract: | 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevResearch.1.022008 |
It is part of: | Physical Review Research, 2019, vol. 1, num. 2, p. 022008 |
URI: | http://hdl.handle.net/2445/143324 |
Related resource: | https://doi.org/10.1103/PhysRevResearch.1.022008 |
ISSN: | 2643-1564 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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