Gravitaxis of asymmetric self-propelled colloidal particles


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TEN HAGEN, Borge, Felix KÜMMEL, Raphael WITTKOWSKI, Daisuke TAKAGI, Hartmut LÖWEN, Clemens BECHINGER, 2014. Gravitaxis of asymmetric self-propelled colloidal particles. In: Nature Communications. 5, 4829. eISSN 2041-1723

@article{ten Hagen2014-09-24T10:15:02ZGravi-39276, title={Gravitaxis of asymmetric self-propelled colloidal particles}, year={2014}, doi={10.1038/ncomms5829}, volume={5}, journal={Nature Communications}, author={ten Hagen, Borge and Kümmel, Felix and Wittkowski, Raphael and Takagi, Daisuke and Löwen, Hartmut and Bechinger, Clemens}, note={Article Number: 4829} }

<rdf:RDF xmlns:rdf="" xmlns:bibo="" xmlns:dc="" xmlns:dcterms="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:creator>Takagi, Daisuke</dc:creator> <dc:contributor>Takagi, Daisuke</dc:contributor> <dc:contributor>Wittkowski, Raphael</dc:contributor> <dcterms:title>Gravitaxis of asymmetric self-propelled colloidal particles</dcterms:title> <dcterms:abstract xml:lang="eng">Many motile microorganisms adjust their swimming motion relative to the gravitational field and thus counteract sedimentation to the ground. This gravitactic behavior is often the result of an inhomogeneous mass distribution which aligns the microorganism similar to a buoy. However, it has been suggested that gravitaxis can also result from a geometric fore-rear asymmetry, typical for many self-propelling organisms. Despite several attempts, no conclusive evidence for such an asymmetry-induced gravitactic motion exists. Here, we study the motion of asymmetric self-propelled colloidal particles which have a homogeneous mass density and a well-defined shape. In experiments and by theoretical modeling we demonstrate that a shape anisotropy alone is sufficient to induce gravitactic motion with either preferential upward or downward swimming. In addition, also trochoid-like trajectories transversal to the direction of gravity are observed.</dcterms:abstract> <dc:date rdf:datatype="">2017-06-14T09:25:47Z</dc:date> <dc:language>eng</dc:language> <bibo:uri rdf:resource=""/> <dc:creator>Wittkowski, Raphael</dc:creator> <dc:contributor>Bechinger, Clemens</dc:contributor> <dc:contributor>Löwen, Hartmut</dc:contributor> <dcterms:issued>2014-09-24T10:15:02Z</dcterms:issued> <dcterms:available rdf:datatype="">2017-06-14T09:25:47Z</dcterms:available> <dc:creator>Kümmel, Felix</dc:creator> <dc:contributor>Kümmel, Felix</dc:contributor> <dc:creator>Bechinger, Clemens</dc:creator> <dc:contributor>ten Hagen, Borge</dc:contributor> <dcterms:rights rdf:resource=""/> <dc:creator>Löwen, Hartmut</dc:creator> <dc:creator>ten Hagen, Borge</dc:creator> </rdf:Description> </rdf:RDF>

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