English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/100749
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

Magnetic and microstructural analysis of palladium nanoparticles with different capping systems

AuthorsLitrán, R.; Sampedro, Blanca ; Rojas, T. Cristina; Multigner, M.; Sánchez-López, J.C. ; Crespo, Patricia; López-Cartes, C.; García García-Tuñón, Miguel Ángel ; Hernando, Antonio ; Fernández-Camacho, A.
KeywordsGold nanoparticles
PD
Clusters
Ferromagnetism
Issue Date2006
PublisherAmerican Institute of Physics
CitationPhysical Review B 73: 054404 (2006)
AbstractPalladium nanoparticles capped with different protective systems in a size range between 1.2 and 2.4 nm have been obtained by varying the preparation chemical method. Magnetization curves for all the samples show hysteresis loops, evidencing a ferromagnetic or a permanent magnetism in the nanoparticles. The microstructure of the nanoparticles has been analyzed by x-ray absorption and transmission electron microscopy. The nature of the magnetic behavior found for all these Pd nanoparticles (NPs) is different depending on their sizes and structural features and is explained on the basis of two different suggested mechanisms. The particles protected by means of a surfactant (tetralkylammonium salts), present a ferromagnetic order related to the factors increasing the density of states just below the Fermi level. Whereas, when the nanoparticles are stabilized by covalent bonds with protective species (thiol derivatized alkane chains or surface oxidized Pd NPs), the increase of the 4d density of holes, localized by the bonded atoms (S or O), is giving rise to the observed ferromagneticlike behavior. © 2006 The American Physical Society.
URIhttp://hdl.handle.net/10261/100749
DOI10.1103/PhysRevB.73.054404
Identifiersdoi: 10.1103/PhysRevB.73.054404
issn: 1098-0121
e-issn: 1095-3795
Appears in Collections:(ICV) Artículos
(ICMS) Artículos
Files in This Item:
File Description SizeFormat 
Magnetic and microstructural analysis.pdf410,7 kBAdobe 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.