English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/92756
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Preventing the Degradation of Ag Nanoparticles Using an Ultrathin a¿Al2O3 Layer as Protective Barrier

AutorBaraldi, G. ; Carrada, M.; Toudert, Johann ; Ferrer, F. J. ; Arbouet, A.; Paillard, V.; Gonzalo de los Reyes, José
Fecha de publicación2013
EditorAmerican Chemical Society
CitaciónJournal of Physical Chemistry C 117: 9431-9439 (2013)
ResumenWe compare the morphology and optical response of plasmonic nanostructures produced by pulsed laser deposition, consisting of a 2D distribution of Ag nanoparticles exposed to air or buried under an amorphous Al2O3 layer whose thickness is tuned in the 0.5 to 14 nm range. We observe that the covering process leads to drastic changes in Ag content, which are interpreted in terms of sputtering of Ag atoms promoted by the incoming Al ions. This Ag sputtering process is avoided as soon as the nanoparticles are embedded under a subnanometer-thick layer of amorphous Al2O3. Meanwhile, the spectral position of the nanoparticles¿ characteristic surface plasmon resonance, measured immediately after the film growth, is not significantly affected by the deposition of the covering layer. Nevertheless, the resonance band associated with uncovered Ag nanoparticles has vanished after 12 months, as a result of their oxidation. Embedding the nanoparticles under a subnanometer-thick layer of amorphous Al2O3 is enough to avoid the observed atmospheric aging processes as well as to preserve the features of their surface plasmon resonance. The results presented here are therefore promising in view of the pulsed laser deposition-based elaboration, at the wafer scale, of robust and stable tailor-made plasmonic substrates that may potentially present high electromagnetic coupling with their environment due to the very small distance to the nanostructure surface. © 2013 American Chemical Society
Identificadoresdoi: 10.1021/jp401421m
issn: 1932-7447
Aparece en las colecciones: (CFMAC-IO) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.