Active particles sense micromechanical properties of glasses

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LOZANO, Celia, Juan Ruben GOMEZ SOLANO, Clemens BECHINGER, 2019. Active particles sense micromechanical properties of glasses. In: Nature Materials. 18(10), pp. 1118-1123. ISSN 1476-1122. eISSN 1476-4660. Available under: doi: 10.1038/s41563-019-0446-9

@article{Lozano2019-10Activ-46850, title={Active particles sense micromechanical properties of glasses}, year={2019}, doi={10.1038/s41563-019-0446-9}, number={10}, volume={18}, issn={1476-1122}, journal={Nature Materials}, pages={1118--1123}, author={Lozano, Celia and Gomez Solano, Juan Ruben and Bechinger, Clemens} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:date rdf:datatype="">2019-09-13T12:12:03Z</dc:date> <dc:contributor>Bechinger, Clemens</dc:contributor> <dc:contributor>Lozano, Celia</dc:contributor> <dc:creator>Bechinger, Clemens</dc:creator> <dcterms:rights rdf:resource=""/> <dcterms:issued>2019-10</dcterms:issued> <dc:rights>terms-of-use</dc:rights> <dc:contributor>Gomez Solano, Juan Ruben</dc:contributor> <dc:creator>Lozano, Celia</dc:creator> <dcterms:title>Active particles sense micromechanical properties of glasses</dcterms:title> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:hasPart rdf:resource=""/> <dcterms:abstract xml:lang="eng">Understanding the mechanical properties of glasses is a great scientific challenge. A powerful technique to study the material response on a microscopic scale is microrheology, in which one analyses the translational dynamics of an externally driven probe particle. Here we show that the translational and rotational dynamics of a self-propelled probe particle with an unconstrained orientational motion can be used to gather information about the mechanical properties of a colloidal glassy system. We find that its rotational diffusion coefficient continuously increases towards the glass transition and drops down in the glassy state. Such unexpected behaviour demonstrates a strong coupling mechanism between the orientation of the active probe particle and the glassy structure, which can be well described by a simple rheological model. Our results suggest that active probe particles may be useful for the micromechanical characterization of complex materials.</dcterms:abstract> <dc:creator>Gomez Solano, Juan Ruben</dc:creator> <dspace:isPartOfCollection rdf:resource=""/> <dcterms:available rdf:datatype="">2019-09-13T12:12:03Z</dcterms:available> <dc:language>eng</dc:language> <bibo:uri rdf:resource=""/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dcterms:isPartOf rdf:resource=""/> <dspace:hasBitstream rdf:resource=""/> </rdf:Description> </rdf:RDF>

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