Rotational diffusion in a bistable potential

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MERTELJ, Alenka, José Luis ARAUZ-LARA, Georg MARET, Thomas GISLER, Holger STARK, 2002. Rotational diffusion in a bistable potential. In: Europhysics Letters. 59(3), pp. 337-343. ISSN 0295-5075. eISSN 1286-4854

@article{Mertelj2002Rotat-4949, title={Rotational diffusion in a bistable potential}, year={2002}, doi={10.1209/epl/i2002-00199-0}, number={3}, volume={59}, issn={0295-5075}, journal={Europhysics Letters}, pages={337--343}, author={Mertelj, Alenka and Arauz-Lara, José Luis and Maret, Georg and Gisler, Thomas and Stark, Holger} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/4949"> <dcterms:title>Rotational diffusion in a bistable potential</dcterms:title> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T14:51:36Z</dc:date> <dc:creator>Arauz-Lara, José Luis</dc:creator> <dcterms:bibliographicCitation>First publ. in: Europhysics Letters 59 (2002), 3, pp. 337-343</dcterms:bibliographicCitation> <dcterms:rights rdf:resource="https://creativecommons.org/licenses/by-nc-nd/2.0/legalcode"/> <dc:creator>Gisler, Thomas</dc:creator> <dc:creator>Mertelj, Alenka</dc:creator> <dc:contributor>Mertelj, Alenka</dc:contributor> <dc:format>application/pdf</dc:format> <dc:creator>Stark, Holger</dc:creator> <dc:language>eng</dc:language> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/4949"/> <dc:contributor>Arauz-Lara, José Luis</dc:contributor> <dc:contributor>Stark, Holger</dc:contributor> <dc:contributor>Maret, Georg</dc:contributor> <dc:contributor>Gisler, Thomas</dc:contributor> <dc:creator>Maret, Georg</dc:creator> <dcterms:issued>2002</dcterms:issued> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T14:51:36Z</dcterms:available> <dc:rights>deposit-license</dc:rights> <dcterms:abstract xml:lang="eng">Using depolarized quasielastic light scattering, we have investigated the rotational diffusion of optically anisotropic colloidal particles in a dilute suspension subject to external electric and magnetic fields (Eo,Bo). The particles were produced by the polymerization of nematic liquid crystal droplets, leading to birefringent colloidal spheres whose frozen orientational order is rigidly coupled to the particle orientation. The torque on the droplet director u(t) originating from the coupling of Eo and Bo to the particles anisotropy in the refractive index and in the diamagnetic susceptibility, respectively, leads to a suppression of the orientational fluctuations about the direction of the external field. We observe a strong dependence of the measured relaxation rates on the field strength and on the orientation of the field relative to the scattering plane. We explain our findings by a solution of the Smoluchowski equation describing rotational diffusion in a bistable potential V (u) which has two equivalent minima separated by a potential barrier whose height is proportional to (Eo,Bo)².</dcterms:abstract> </rdf:Description> </rdf:RDF>

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