Vana, Philipp

[["dc.bibliographiccitation.artnumber","092002"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","New Journal of Physics"],["dc.bibliographiccitation.lastpage","10"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Döring, Florian"],["dc.contributor.author","Ulrichs, Henning"],["dc.contributor.author","Pagel, Sinja"],["dc.contributor.author","Müller, Markus"],["dc.contributor.author","Mansurova, Maria"],["dc.contributor.author","Müller, Matthias"],["dc.contributor.author","Eberl, Christian"],["dc.contributor.author","Erichsen, Torben"],["dc.contributor.author","Huebner, Dennis"],["dc.contributor.author","Vana, Philipp"],["dc.contributor.author","Mann, Klaus"],["dc.contributor.author","Münzenberg, Markus"],["dc.contributor.author","Krebs, Hans Ulrich"],["dc.date.accessioned","2018-08-15T15:21:20Z"],["dc.date.available","2018-08-15T15:21:20Z"],["dc.date.issued","2016"],["dc.description.abstract","Nanoscale multilayer thin films of W and PC (Polycarbonate) show, due to the great difference of the components' characteristics, fascinating properties for a variety of possible applications and provide an interesting research field, but are hard to fabricate with low layer thicknesses. Because of the great acoustic mismatch between the two materials, such nanoscale structures are promising candidates for new phononic materials, where phonon propagation is strongly reduced. In this article we show for the first time that W/PC-multilayers can indeed be grown with high quality by pulsed laser deposition. We analyzed the polymer properties depending on the laser fluence used for deposition, which enabled us to find best experimental conditions for the fabrication of high-acoustic-mismatch W/PC multilayers. The multilayers were analyzed by fs pump-probe spectroscopy showing that phonon dynamics on the ps time-scale can strongly be tailored by structural design. While already periodic multilayers exhibit strong phonon localization, especially aperiodic structures present outstandingly low phonon propagation properties making such 1D-layered W/PC nano-structures interesting for new phononic applications."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2016"],["dc.identifier.doi","10.1088/1367-2630/18/9/092002"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13969"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15313"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation.orgunit","Fakultät für Physik"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","CC BY 3.0"],["dc.title","Confinement of phonon propagation in laser deposited tungsten/polycarbonate multilayers"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","711"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Applied Physics A"],["dc.bibliographiccitation.lastpage","715"],["dc.bibliographiccitation.volume","98"],["dc.contributor.author","Fuchs, Britta"],["dc.contributor.author","Schlenkrich, Felix"],["dc.contributor.author","Seyffarth, Susanne"],["dc.contributor.author","Meschede, Andreas"],["dc.contributor.author","Rotzoll, Robert"],["dc.contributor.author","Vana, Philipp"],["dc.contributor.author","Grossmann, Peter"],["dc.contributor.author","Mann, Klaus"],["dc.contributor.author","Krebs, Hans-Ulrich"],["dc.date.accessioned","2018-11-07T08:45:09Z"],["dc.date.available","2018-11-07T08:45:09Z"],["dc.date.issued","2010"],["dc.description.abstract","Smooth poly(methyl methacrylate) (PMMA) films without any droplets were pulsed laser deposited at a wavelength of 248 nm and a laser fluence of 125 mJ/cm(2). After deposition at room temperature, the films possess low universal hardness of only 3 N/mm(2). Thermal treatments up to 200A degrees C, either during deposition or afterwards, lead to film hardening up to values of 200 N/mm(2). Using a combination of complementary methods, two main mechanisms could be made responsible for this temperature induced hardening effect well above the glass transition temperature of 102A degrees C. The first process is induced by the evaporation of chain fragments and low molecular mass material, which are present in the film due to the ablation process, leading to an increase of the average molecular mass and thus to hardening. The second mechanism can be seen in partial cross-linking of the polymer film as soon as chain scission occurs at higher temperatures and the mobility and reactivity of the polymer material is high enough."],["dc.identifier.doi","10.1007/s00339-009-5525-3"],["dc.identifier.isi","000274330700003"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/4032"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20369"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0947-8396"],["dc.relation.orgunit","Fakultät für Physik"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights.access","openAccess"],["dc.rights.uri","https://goedoc.uni-goettingen.de/licenses"],["dc.subject.ddc","530"],["dc.title","Hardening of smooth pulsed laser deposited PMMA films by heating"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]