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dc.contributor.authorPagès, Josep M.-
dc.contributor.authorStraube, Arthur V.-
dc.contributor.authorTierno, Pietro-
dc.contributor.authorIgnés i Mullol, Jordi-
dc.contributor.authorSagués i Mestre, Francesc-
dc.description.abstractWe present a quantitative analysis of the nonequilibrium assembly of colloidal particles dispersed in a nematic liquid crystal. The driven particles assemble into reconfigurable circular clusters by liquid-crystal-enabled electrokinetic phenomena generated by an AC electric field that provides propulsion along the local director. We identify the coexistence of different aggregation states, including a central, jammed core, where short-range elastic attraction dominates, surrounded by a liquid-like corona where particles retain their mobility but reach a mechanical equilibrium that we rationalize in terms of a balance between centripetal phoretic drive and pairwise repulsion. An analysis of the compressible liquid-like region reveals a linear density profile that can be tuned with the field frequency, and a bond-orientational order that reaches a maximum at intermediate packing densities, where elastic effects are minimized. Since the phoretic propulsion force acts also on assembled particles, we compute the mechanical pressure and show that a hard-disk equation of state can be used to describe the assembly of this driven system.-
dc.format.extent9 p.-
dc.publisherRoyal Society of Chemistry-
dc.relation.isformatofVersió postprint del document publicat a:
dc.relation.ispartofSoft Matter, 2018, vol. 15, p. 312-320-
dc.rights(c) Pagès, Josep M. et al., 2018-
dc.subject.classificationCristalls líquids-
dc.subject.otherLiquid crystals-
dc.titleInhomogeneous assembly of driven nematic colloids-
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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