@prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . @prefix prodotto: . unitaDiPersonaleInterno:MATRICOLA9034 pubblicazioni:autoreCNRDi prodotto:ID208268 . @prefix prodottidellaricerca: . @prefix istituto: . istituto:CDS036 prodottidellaricerca:prodotto prodotto:ID208268 . istituto:CDS052 prodottidellaricerca:prodotto prodotto:ID208268 . @prefix modulo: . modulo:ID5427 prodottidellaricerca:prodotto prodotto:ID208268 . @prefix rdf: . @prefix retescientifica: . prodotto:ID208268 rdf:type retescientifica:ProdottoDellaRicerca , prodotto:TIPO1101 . @prefix rdfs: . prodotto:ID208268 rdfs:label "Self-affine silver films and surface-enhanced Raman scattering: Linking spectroscopy to morphology (Articolo in rivista)"@en . @prefix xsd: . prodotto:ID208268 pubblicazioni:anno "2000-01-01T00:00:00+01:00"^^xsd:gYear ; pubblicazioni:doi "10.1063/1.1309134"^^xsd:string . @prefix skos: . prodotto:ID208268 skos:altLabel "
C. Douketis 1, T. L. Haslett1, 2, Z. Wang 1, M. Moskovits 1, and S. Iannotta 3 (2000)
Self-affine silver films and surface-enhanced Raman scattering: Linking spectroscopy to morphology
in The Journal of chemical physics; American Institute of Physics, Melville [NY] (Stati Uniti d'America)
"^^rdf:HTML ; pubblicazioni:autori "C. Douketis 1, T. L. Haslett1, 2, Z. Wang 1, M. Moskovits 1, and S. Iannotta 3"^^xsd:string ; pubblicazioni:paginaInizio "11315"^^xsd:string ; pubblicazioni:paginaFine "11323"^^xsd:string ; pubblicazioni:url "http://jcp.aip.org/resource/1/jcpsa6/v113/i24/p11315_s1?"^^xsd:string ; pubblicazioni:numeroVolume "113"^^xsd:string . @prefix ns11: . prodotto:ID208268 pubblicazioni:rivista ns11:ID289195 ; pubblicazioni:numeroFascicolo "24"^^xsd:string ; skos:note "ISI Web of Science (WOS)"^^xsd:string ; pubblicazioni:affiliazioni "1 Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada;2 Photonics Research Ontario, Toronto M5S 1A7, Canada; 3 Centro Studi CNR, F.S.A.I.I. Povo di Trento 38050, Italy"^^xsd:string ; pubblicazioni:titolo "Self-affine silver films and surface-enhanced Raman scattering: Linking spectroscopy to morphology"^^xsd:string ; prodottidellaricerca:abstract "The relationship between the self-affine structure of cold-deposited films and the surface-enhanced Raman (SERS) intensity of benzene adsorbed on the films is examined. Based on variable temperature STM studies the structure of cold-deposited silver films is shown to be self-affine with a fractal dimension similar to2.6, more or less independent of temperature for T less than similar to 270 K. The fractal structure is shown to collapse to a more or less compact structure when the films are annealed to similar to 280 K. SERS activity ceases at a somewhat lower temperature (similar to 250 K) for all the films examined. SERS enhancements rise by factors as great as 8 as a function of annealing temperature over and above their values at the lowest deposition temperatures used (24 K). The rise reaches a maximum at a temperature that depends both on the deposition temperature of the films and the excitation wavelength. (Such an annealing effect on the SERS intensity has been known for many years.) We suggest that the observations are consistent with recently developed theories of the optical properties of fractal clusters so long as one includes arguments regarding the optimal dimensions of the monomers comprising those clusters whose mean value change during annealing. (Fractality, however, is not an essential condition for observing intense SERS.) The disappearance of the SERS signal before the self-affine structure of the film collapses is, therefore, attributed to the monomer size having significantly passed its optimal size before the temperature at which the collapse of the fractal nature of the film is reached. We argue that this collapse is mediated by surface diffusion. The narrow temperature range over which this occurs is intriguing and worthy of a proper theoretical investigation."@en . @prefix ns12: . prodotto:ID208268 pubblicazioni:editore ns12:ID98 ; prodottidellaricerca:prodottoDi modulo:ID5427 , istituto:CDS036 , istituto:CDS052 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA9034 . @prefix parolechiave: . prodotto:ID208268 parolechiave:insiemeDiParoleChiave . ns12:ID98 pubblicazioni:editoreDi prodotto:ID208268 . ns11:ID289195 pubblicazioni:rivistaDi prodotto:ID208268 . parolechiave:insiemeDiParoleChiaveDi prodotto:ID208268 .