Transient dynamics of a colloidal particle driven through a viscoelastic fluid


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GOMEZ-SOLANO, Juan Ruben, Clemens BECHINGER, 2015. Transient dynamics of a colloidal particle driven through a viscoelastic fluid. In: New Journal of Physics. 17(10), 103032. eISSN 1367-2630. Available under: doi: 10.1088/1367-2630/17/10/103032

@article{GomezSolano2015-10-16Trans-39258, title={Transient dynamics of a colloidal particle driven through a viscoelastic fluid}, year={2015}, doi={10.1088/1367-2630/17/10/103032}, number={10}, volume={17}, journal={New Journal of Physics}, author={Gomez-Solano, Juan Ruben and Bechinger, Clemens}, note={Article Number: 103032} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:rights>terms-of-use</dc:rights> <dspace:hasBitstream rdf:resource=""/> <dcterms:available rdf:datatype="">2017-06-13T12:01:14Z</dcterms:available> <dc:contributor>Gomez-Solano, Juan Ruben</dc:contributor> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <bibo:uri rdf:resource=""/> <dcterms:abstract xml:lang="eng">We study the transient motion of a colloidal particle actively dragged by an optical trap through different viscoelastic fluids (wormlike micelles, polymer solutions, and entangled λ-phage DNA). We observe that, after sudden removal of the moving trap, the particle recoils due to the recovery of the deformed fluid microstructure. We find that the transient dynamics of the particle proceeds via a double-exponential relaxation, whose relaxation times remain independent of the initial particle velocity whereas their amplitudes strongly depend on it. While the fastest relaxation mirrors the viscous damping of the particle by the solvent, the slow relaxation results from the recovery of the strained viscoelastic matrix. We show that this transient information, which has no counterpart in Newtonian fluids, can be exploited to investigate linear and nonlinear rheological properties of the embedding fluid, thus providing a novel method to perform transient rheology at the micron-scale.</dcterms:abstract> <dc:language>eng</dc:language> <dc:creator>Bechinger, Clemens</dc:creator> <dcterms:hasPart rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dcterms:title>Transient dynamics of a colloidal particle driven through a viscoelastic fluid</dcterms:title> <dc:date rdf:datatype="">2017-06-13T12:01:14Z</dc:date> <dc:creator>Gomez-Solano, Juan Ruben</dc:creator> <dcterms:rights rdf:resource=""/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:contributor>Bechinger, Clemens</dc:contributor> <dcterms:issued>2015-10-16</dcterms:issued> <dspace:isPartOfCollection rdf:resource=""/> </rdf:Description> </rdf:RDF>

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