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Intermolecular Interactions of Polymer Molecules Determined by Single-Molecule Force Spectroscopy

Intermolecular Interactions of Polymer Molecules Determined by Single-Molecule Force Spectroscopy

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SCHERER, Alexandra, Chunqing ZHOU, Jens MICHAELIS, Christoph BRÄUCHLE, Andreas ZUMBUSCH, 2005. Intermolecular Interactions of Polymer Molecules Determined by Single-Molecule Force Spectroscopy. In: Macromolecules. 38(23), pp. 9821-9825. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma051415d

@article{Scherer2005-11Inter-42313, title={Intermolecular Interactions of Polymer Molecules Determined by Single-Molecule Force Spectroscopy}, year={2005}, doi={10.1021/ma051415d}, number={23}, volume={38}, issn={0024-9297}, journal={Macromolecules}, pages={9821--9825}, author={Scherer, Alexandra and Zhou, Chunqing and Michaelis, Jens and Bräuchle, Christoph and Zumbusch, Andreas} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/42313"> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dc:contributor>Zumbusch, Andreas</dc:contributor> <dc:creator>Bräuchle, Christoph</dc:creator> <dc:creator>Michaelis, Jens</dc:creator> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/42313"/> <dc:language>eng</dc:language> <dcterms:title>Intermolecular Interactions of Polymer Molecules Determined by Single-Molecule Force Spectroscopy</dcterms:title> <dc:creator>Zhou, Chunqing</dc:creator> <dc:creator>Scherer, Alexandra</dc:creator> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:issued>2005-11</dcterms:issued> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-05-11T12:34:12Z</dcterms:available> <dc:creator>Zumbusch, Andreas</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-05-11T12:34:12Z</dc:date> <dcterms:abstract xml:lang="eng">Force spectroscopy on the single-molecule level allows the investigation of intramolecular as well as interdomain and intermolecular interactions of both synthetic and natural polymers. In these experiments, a single molecule is usually stretched between two strong attachment points. The force then increases with increasing extension. Under certain conditions, however, force−extension curves result in force plateaus; an increase in extension is observed under constant force. These plateaus do not depend on pulling speed and therefore indicate transitions at equilibrium. Here we present single-molecule data where carboxymethycellulose (CMC) molecules are pulled out of a polymer film into a poor solvent. The resulting force−extension curves show not only one but up to seven force plateaus. The step height from one force plateau to the next is nonuniform but follows a characteristic spacing. This is the first time that nonuniform force plateaus are reported for polymer molecules. A simple model for the polymer−polymer and polymer−solvent interactions explains the measured data. In this model the new solvent−polymer interface gain during the pull is minimized by the formation of a tightly packed polymer bundle. By introducing a parameter for the product of effective radius of the polymer multiplied by surface tension, as well as a second parameter describing the interaction between polymer strands in the bundle, one finds excellent agreement between predicted and measured plateau heights. This model, therefore, provides a basis to investigate the interactions of polymer chains and the influence of solvent in well-defined geometries using single-molecule force spectroscopy.</dcterms:abstract> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:contributor>Michaelis, Jens</dc:contributor> <dc:contributor>Scherer, Alexandra</dc:contributor> <dc:contributor>Zhou, Chunqing</dc:contributor> <dc:contributor>Bräuchle, Christoph</dc:contributor> </rdf:Description> </rdf:RDF>

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