English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/7600
Title: Evolution of the microstructure, chemical composition and magnetic behaviour during the synthesis of alkanethiol-capped gold nanoparticles
Authors: Guerrero, Estefanía; Rojas, T. Cristina; Fernández-Camacho, A.; Multigner, M.; Crespo, Patricia; Muñoz-Márquez, Miguel Ángel; García, M. A.; Hernando, Antonio
Keywords: Gold nanoparticles
Magnetic behaviour
Issue Date: 21-Dec-2006
Publisher: Elsevier
Citation: Acta Materialia, 55 (5) : 1723-1730 (2007)
Abstract: In the present paper, we show an exhaustive microstructural characterization of thiol-capped gold nanoparticles (NPs) with two different average particle sizes. These samples are compared with the polymer-like Au(I) phase formed as a precursor during the synthesis of the thiol-capped gold NPs. The set of analysed samples shows different microstructures at the nanoscale with different proportions of Au atoms bonded either to S or to Au atoms. It has been experimentally shown that the presence of a ferromagnetic-like behaviour is associated to the formation of NPs with simultaneous presence of Au–Au and Au–S bonds. In order to explain such magnetic behaviour a possible model is proposed based on the spin–orbit coupling so that localized charges and/or spins (Au–S bonds) can trap conduction electrons (Au–Au bonds) in orbits.
Publisher version (URL): http:dx.doi.org/10.1016/j.actamat.2006.10.033
URI: http://hdl.handle.net/10261/7600
DOI: 10.1016/j.actamat.2006.10.033
ISSN: 1359-6454 (Print)
Appears in Collections:(ICMS) Artículos
Files in This Item:
File Description SizeFormat 
ActaMaterialia_55_1723.pdf4,92 MBAdobe PDFThumbnail
Show full item record

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