Active particles in geometrically confined viscoelastic fluids

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NARINDER, Narinder, Juan Ruben GOMEZ-SOLANO, Clemens BECHINGER, 2019. Active particles in geometrically confined viscoelastic fluids. In: New Journal of Physics. 21(9), 093058. eISSN 1367-2630. Available under: doi: 10.1088/1367-2630/ab40e0

@article{Narinder2019-09-24Activ-47523, title={Active particles in geometrically confined viscoelastic fluids}, year={2019}, doi={10.1088/1367-2630/ab40e0}, number={9}, volume={21}, journal={New Journal of Physics}, author={Narinder, Narinder and Gomez-Solano, Juan Ruben and Bechinger, Clemens}, note={Article Number: 093058} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:isPartOf rdf:resource=""/> <dc:contributor>Bechinger, Clemens</dc:contributor> <dc:creator>Gomez-Solano, Juan Ruben</dc:creator> <dspace:hasBitstream rdf:resource=""/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:creator>Bechinger, Clemens</dc:creator> <dc:contributor>Narinder, Narinder</dc:contributor> <bibo:uri rdf:resource=""/> <dcterms:rights rdf:resource=""/> <dc:contributor>Gomez-Solano, Juan Ruben</dc:contributor> <dcterms:abstract xml:lang="eng">We experimentally study the dynamics of active particles (APs) in a viscoelastic fluid under various geometrical constraints such as flat walls, spherical obstacles and cylindrical cavities. We observe that the main effect of the confined viscoelastic fluid is to induce an effective repulsion on the APs when moving close to a rigid surface, which depends on the incident angle, the surface curvature and the particle activity. Additionally, the geometrical confinement imposes an asymmetry to their movement, which leads to strong hydrodynamic torques, thus resulting in detention times on the wall surface orders of magnitude shorter than suggested by thermal diffusion. We show that such viscoelasticity-mediated interactions have striking consequences on the behavior of multi-AP systems strongly confined in a circular pore. In particular, these systems exhibit a transition from liquid-like behavior to a highly ordered state upon increasing their activity. A further increase in activity melts the order, thus leading to a re-entrant liquid-like behavior.</dcterms:abstract> <dcterms:hasPart rdf:resource=""/> <dc:rights>terms-of-use</dc:rights> <dcterms:available rdf:datatype="">2019-11-18T09:45:10Z</dcterms:available> <dcterms:issued>2019-09-24</dcterms:issued> <dspace:isPartOfCollection rdf:resource=""/> <dc:creator>Narinder, Narinder</dc:creator> <dc:date rdf:datatype="">2019-11-18T09:45:10Z</dc:date> <dc:language>eng</dc:language> <dcterms:title>Active particles in geometrically confined viscoelastic fluids</dcterms:title> </rdf:Description> </rdf:RDF>

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