Mostrar el registro sencillo del ítem
dc.contributor.author
Hettich, Mike
dc.contributor.author
Jacob, Karl
dc.contributor.author
Ristow, Oliver
dc.contributor.author
Schubert, Martin
dc.contributor.author
Bruchhausen, Axel Emerico
dc.contributor.author
Gusev, Vitalyi
dc.contributor.author
Dekorsy, Thomas
dc.date.available
2019-06-12T18:35:55Z
dc.date.issued
2016-09-16
dc.identifier.citation
Hettich, Mike; Jacob, Karl; Ristow, Oliver; Schubert, Martin; Bruchhausen, Axel Emerico; et al.; Viscoelastic properties and efficient acoustic damping in confined polymer nano-layers at GHz frequencie; Nature Publishing Group; Scientific Reports; 6; 16-9-2016; 1-9
dc.identifier.issn
2045-2322
dc.identifier.uri
http://hdl.handle.net/11336/78102
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Nature Publishing Group
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
Polymer Molecular Nano-Layers
dc.subject
Viscoelastic Properties
dc.subject
Time Resolved Optical Pump-Probe Spectroscopy
dc.subject
Acoustic Damping
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Viscoelastic properties and efficient acoustic damping in confined polymer nano-layers at GHz frequencie
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-06-11T15:04:26Z
dc.journal.volume
6
dc.journal.pagination
1-9
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Hettich, Mike. University of Konstanz; Alemania
dc.description.fil
Fil: Jacob, Karl. University of Konstanz; Alemania
dc.description.fil
Fil: Ristow, Oliver. University of Konstanz; Alemania
dc.description.fil
Fil: Schubert, Martin. University of Konstanz; Alemania
dc.description.fil
Fil: Bruchhausen, Axel Emerico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. University of Konstanz; Alemania
dc.description.fil
Fil: Gusev, Vitalyi. Université du Maine; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Dekorsy, Thomas. German Aerospace Center; Alemania
dc.journal.title
Scientific Reports
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1038/srep33471
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/srep33471
Archivos asociados