Nano Archive

Permanent magnetism in phosphine- and chlorine-capped gold: from clusters to nanoparticles

Munoz-Marquez, Miguel A. and Guerrero, Estefania and Fernandez, Asuncion and Crespo, Patricia and Hernando, Antonio and Lucena, Raquel and Conesa, Jose C. (2010) Permanent magnetism in phosphine- and chlorine-capped gold: from clusters to nanoparticles. Journal of Nanoparticle Research, 12 (4). pp. 1307-1318.

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Abstract

Magnetometry results have shown that gold NPs (similar to 2 nm in size) protected with phosphine and chlorine ligands exhibit permanent magnetism. When the NPs size decreases down to the subnanometric size range, e.g. undecagold atom clusters, the permanent magnetism disappears. The near edge structure of the X-ray absorption spectroscopy data points out that charge transfer between gold and the capping system occurs in both cases. These results strongly suggest that nearly metallic Au bonds are also required for the induction of a magnetic response. Electron paramagnetic resonance observations indicate that the contribution to magnetism from eventual iron impurities can be disregarded.

Item Type:Article
Subjects:Material Science > Nanostructured materials
ID Code:8859
Deposited By:CSMNT
Deposited On:25 Aug 2010 08:55
Last Modified:25 Aug 2010 08:55

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