KOPS - Das Institutionelle Repositorium der Universität Konstanz

Viscoelastic properties and efficient acoustic damping in confined polymer nano-layers at GHz frequencies

Viscoelastic properties and efficient acoustic damping in confined polymer nano-layers at GHz frequencies

Zitieren

Dateien zu dieser Ressource

Prüfsumme: MD5:e5b7bf890a3ca713d6083bf526b2d4c9

HETTICH, Mike, Karl JACOB, Oliver RISTOW, Martin SCHUBERT, Axel BRUCHHAUSEN, Vitalyi GUSEV, Thomas DEKORSY, 2016. Viscoelastic properties and efficient acoustic damping in confined polymer nano-layers at GHz frequencies. In: Scientific Reports. 6, 33471. eISSN 2045-2322. Available under: doi: 10.1038/srep33471

@article{Hettich2016-09-16Visco-35372, title={Viscoelastic properties and efficient acoustic damping in confined polymer nano-layers at GHz frequencies}, year={2016}, doi={10.1038/srep33471}, volume={6}, journal={Scientific Reports}, author={Hettich, Mike and Jacob, Karl and Ristow, Oliver and Schubert, Martin and Bruchhausen, Axel and Gusev, Vitalyi and Dekorsy, Thomas}, note={Article Number: 33471} }

<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/123456789/35372"> <dc:contributor>Jacob, Karl</dc:contributor> <dc:creator>Jacob, Karl</dc:creator> <dc:contributor>Ristow, Oliver</dc:contributor> <dc:creator>Dekorsy, Thomas</dc:creator> <dc:language>eng</dc:language> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/35372"/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:creator>Schubert, Martin</dc:creator> <dc:creator>Hettich, Mike</dc:creator> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/35372/1/Hettich_0-363803.pdf"/> <dcterms:abstract xml:lang="eng">We investigate the viscoelastic properties of confined molecular nano-layers by time resolved optical pump-probe measurements. Access to the elastic properties is provided by the damping time of acoustic eigenmodes of thin metal films deposited on the molecular nano-layers which show a strong dependence on the molecular layer thickness and on the acoustic eigen-mode frequencies. An analytical model including the viscoelastic properties of the molecular layer allows us to obtain the longitudinal sound velocity as well as the acoustic absorption coefficient of the layer. Our experiments and theoretical analysis indicate for the first time that the molecular nano-layers are much more viscous than elastic in the investigated frequency range from 50 to 120 GHz and thus show pronounced acoustic absorption. The longitudinal acoustic wavenumber has nearly equal real and imaginary parts, both increasing proportional to the square root of the frequency. Thus, both acoustic velocity and acoustic absorption are proportional to the square root of frequency and the propagation of compressional/dilatational acoustic waves in the investigated nano-layers is of the diffusional type, similar to the propagation of shear waves in viscous liquids and thermal waves in solids.</dcterms:abstract> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:contributor>Dekorsy, Thomas</dc:contributor> <dc:creator>Gusev, Vitalyi</dc:creator> <dc:contributor>Hettich, Mike</dc:contributor> <dc:creator>Bruchhausen, Axel</dc:creator> <dcterms:title>Viscoelastic properties and efficient acoustic damping in confined polymer nano-layers at GHz frequencies</dcterms:title> <dc:creator>Ristow, Oliver</dc:creator> <dc:contributor>Bruchhausen, Axel</dc:contributor> <dcterms:issued>2016-09-16</dcterms:issued> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2016-09-21T11:19:30Z</dc:date> <dcterms:rights rdf:resource="http://nbn-resolving.de/urn:nbn:de:bsz:352-20150914100631302-4485392-8"/> <dc:contributor>Gusev, Vitalyi</dc:contributor> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/35372/1/Hettich_0-363803.pdf"/> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2016-09-21T11:19:30Z</dcterms:available> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:contributor>Schubert, Martin</dc:contributor> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> </rdf:Description> </rdf:RDF>

Dateiabrufe seit 21.09.2016 (Informationen über die Zugriffsstatistik)

Hettich_0-363803.pdf 27

Das Dokument erscheint in:

KOPS Suche


Stöbern

Mein Benutzerkonto