English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/59051
Share/Impact:
Statistics
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:

Title

Coverage induced regulation of Au nanoparticles during pulsed laser deposition

AuthorsResta, Vincenzo; Gonzalo de los Reyes, José; Afonso, Carmen N. ; Piscopiello, E.; García López, J.
Issue Date2011
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 109: 094302 (2011)
AbstractThe effects induced during the covering/embedding of metal nanoparticles (NPs) produced by pulsed laser deposition (PLD) and their impact on the structural and optical properties have been studied by producing pairs of samples containing Au NPs that are either uncovered (i.e., at the surface) or covered (i.e., embedded in an amorphous a-Al2O3 host). The main result is that covering species can sputter up to 100% of the Au atoms, the smaller the NPs the higher the sputtered fraction. This fraction has been simulated using standard models for ion bombardment and taking into account the kinetic energy distribution of arriving species and the cohesive energy dependence on NPs dimensions. Although all models well predict the order of magnitude of the sputtering yield, the calculated values are generally smaller than the experimental ones and do not account for the experimental dependence on NPs dimensions. This disagreement is discussed in terms of the limitations of standard models that do not take into account the lower adhesion of small NPs to the substrate, the high flux of species involved in PLD and, possibly to lesser extent, the use of some bulk material parameters. The metal sputtering during the coverage regulates the NPs morphology, through a reduction of dimensions and dimension dispersion. Most changes of structural features and optical spectra when covering the NPs are directly related to the variation in the amount of metal with the exception of a strong blueshift of the surface plasmon resonance when NPs are covered. This shift could be consistent with mixing of covering layer species and metal at the surface of the NPs. © 2011 American Institute of Physics.
Publisher version (URL)http://dx.doi.org/10.1063/1.3549168
URIhttp://hdl.handle.net/10261/59051
DOI10.1063/1.3549168
Identifiersdoi: 10.1063/1.3549168
issn: 0021-8979
Appears in Collections:(CFMAC-IO) Artículos
(CNA) Artículos
Files in This Item:
File Description SizeFormat 
Resta.pdf1,49 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.