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Electronic structure, magnetic properties, and microstructural analysis of thiol-functionalized Au nanoparticles: role of chemical and structural parameters in the ferromagnetic behaviour

AutorGuerrero, Estefanía; Muñoz-Márquez, Miguel Ángel ; Fernández-Pinel, Enrique; Crespo, Patricia; Hernando, Antonio ; Fernández-Camacho, A.
Palabras claveGold nanoparticles
Ferromagnetic behaviour
Fecha de publicación31-jul-2008
CitaciónJournal of Nanoparticle Research (2008)
ResumenGold nanoparticles (NPs) have been stabilized with a variety of thiol-containing molecules in order to change their chemical and physical properties; among the possible capping systems, alkane chains with different lengths, a carboxylic acid and a thiol-containing biomolecule (tiopronin) have been selected as protecting shells for the synthesized NPs; the NPs solubility in water or organic solvents is determined by the protecting molecule. A full microstructural characterization of these NPs is presented in the current research work. It has been shown that NPs capped with alkanethiol chains have a marked ferromagnetic behaviour which might also be dependent on the chain length. The simultaneous presence of Au–Au and Au–S bonds together with a reduced particle diameter, and the formation of an ordered monolayer protective shell, have proved to be key parameters for the ferromagnetic-like behaviour exhibited by thiol-functionalized gold NPs.
DescripciónPublished in Journal of Nanoparticle Research, copyright Springer Science Business Media B.V. 2008
Versión del editorThe original publication is available at http://dx.doi.org/10.1007/s11051-008-9445-5
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