Capped colloids as light-mills in optical traps

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MERKT, Florian, Artur ERBE, Paul LEIDERER, 2006. Capped colloids as light-mills in optical traps. In: New Journal of Physics. 8(216). Available under: doi: 10.1088/1367-2630/8/9/216

@article{Merkt2006Cappe-8940, title={Capped colloids as light-mills in optical traps}, year={2006}, doi={10.1088/1367-2630/8/9/216}, number={216}, volume={8}, journal={New Journal of Physics}, author={Merkt, Florian and Erbe, Artur and Leiderer, Paul} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dcterms:abstract xml:lang="eng">Custom-designed colloidal particles in optical tweezers act as lightmills in a fluid. In particular, aqueous suspensions of capped silica colloids, in which half of the surface is covered with metal layers, are investigated. Due to their asymmetry, the capped colloids can act as rotators when exposed to intense laser fields. Particles of 4.7μm in diameter are observed rotating around the focus of a laser beam. For low intensities, particles become trapped close to the spot of highest laser intensity. Above a threshold value of about 4mW in total beam intensity, the particles move away from the centre of the focus and start to rotate at frequencies of about 1 Hz. The balance of forces due to light pressure and hydrodynamic forces gives a constant rotation rate. The speed of the spinning particle increases linearly with laser power to above 2 Hz until the particles are ejected from the focus for intensities higher than 7mW. Magnetic caps introduce further possibilities to tune the rotation rates.</dcterms:abstract> <dc:rights>Attribution-NonCommercial-NoDerivs 2.0 Generic</dc:rights> <bibo:uri rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dcterms:hasPart rdf:resource=""/> <dc:creator>Leiderer, Paul</dc:creator> <dc:contributor>Merkt, Florian</dc:contributor> <dspace:isPartOfCollection rdf:resource=""/> <dcterms:bibliographicCitation>First publ. in: New Journal of Physics 8 (2006), 216</dcterms:bibliographicCitation> <dcterms:rights rdf:resource=""/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:title>Capped colloids as light-mills in optical traps</dcterms:title> <dc:date rdf:datatype="">2011-03-24T17:52:15Z</dc:date> <dc:creator>Erbe, Artur</dc:creator> <dcterms:issued>2006</dcterms:issued> <dc:creator>Merkt, Florian</dc:creator> <dspace:hasBitstream rdf:resource=""/> <dcterms:available rdf:datatype="">2011-03-24T17:52:15Z</dcterms:available> <dspace:isPartOfCollection rdf:resource=""/> <dc:format>application/pdf</dc:format> <dc:language>eng</dc:language> <dcterms:isPartOf rdf:resource=""/> <dc:contributor>Erbe, Artur</dc:contributor> <dc:contributor>Leiderer, Paul</dc:contributor> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> </rdf:Description> </rdf:RDF>

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