Kolloidale Dispersionen in nematischen Flüssigkristallen


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HUBER, Matthias, 2003. Kolloidale Dispersionen in nematischen Flüssigkristallen

@mastersthesis{Huber2003Kollo-9240, title={Kolloidale Dispersionen in nematischen Flüssigkristallen}, year={2003}, author={Huber, Matthias} }

<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/123456789/9240"> <dc:creator>Huber, Matthias</dc:creator> <dcterms:alternative>Colloidal Dispersions in Nematic Liquid Crystals</dcterms:alternative> <dc:rights>deposit-license</dc:rights> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103416863-3868037-7"/> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/9240"/> <dc:format>application/pdf</dc:format> <dcterms:abstract xml:lang="eng">This thesis shows that the wetting of a colloidal surface by a nematic liquid crystal with planar surface-anchoring leads to a configuration of two or four topological defects which are, respectively, located on the opposite poles of the colloid or on the corners of a tetrahedron. The tetrahedral configuration opens the prospect of tetravalent colloidal bonds corresponding to the bonds of the sp3 hybridised carbon atom, which could be realised with linker-elements like DNA molecules. In order to determine the orientational order of the liquid crystal molecules represented by a three-dimensional order-parameter tensor field, Euler-Lagrange equations are derived by minimising the Landau-de Gennes free energy, which are then solved numerically by means of the Newton-Gauss-Seidel method combined with the method of adaptive grids. In order to create a preferred orientational axis and thus to allow for the existence of defects, a biaxial-oblate orientational order is necessary. Hence wetting transitions from the uniaxial to the biaxial phase are first studied on a plane surface for different surface potentials. The investigations are then expanded to the case of spherical surfaces. Finally the thermodynamic stability of the different defect configurations is analysed.</dcterms:abstract> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:54:48Z</dcterms:available> <dc:contributor>Huber, Matthias</dc:contributor> <dcterms:issued>2003</dcterms:issued> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:54:48Z</dc:date> <dcterms:title>Kolloidale Dispersionen in nematischen Flüssigkristallen</dcterms:title> <dc:language>deu</dc:language> </rdf:Description> </rdf:RDF>

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