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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

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Guerrero, Estefania and Muñoz Márquez, Miguel and Fernández Pinel, Enrique and Crespo del Arco, Patricia and Hernando Grande, Antonio and Fernández, Asunción (2008) Electronic structure, magnetic properties, and microstructural analysis of thiol-functionalized Au nanoparticles: role of chemical and structural parameters in the ferromagnetic behaviour. Journal of nanoparticle research, 10 . pp. 179-192. ISSN 1388-0764

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Official URL: http://dx.doi.org/10.1007/s11051-008-9445-5


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Abstract

Gold 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.


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©Springer.
We wish to acknowledge the support of the ESRF and BM29 beamline staff. Financial support from the Spanish MEC (NAN2004-09125-C07) and “Junta de Andalucía” (Project P06-FQM-02254, group TEP217) is also acknowledged. E. Guerrero thanks the Spanish MEC for financial support.

Uncontrolled Keywords:Capped gold nanoparticles; X-Ray; Tight-binding; Clusters; Spectroscopy; Monolayers; Particles; States; Size; Pd
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:41761
Deposited On:10 Mar 2017 16:48
Last Modified:10 Mar 2017 16:48

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