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X-ray absorption spectroscopy characterization of the interface in capped ZnO nanoparticles

Published online by Cambridge University Press:  27 April 2011

C. Guglieri  and
J. Chaboy
C. Guglieri*
Affiliation:
Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
J. Chaboy
Affiliation:
Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
*
†Email address for correspondence: guglieri@unizar.es
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Abstract

We report here an extensive study of the ZnO nanoparticles (NPs) capped with different organic molecules by X-ray absorption spectroscopy (XAS) methods to proceed in the understanding of their unusual magnetism. We have performed a detailed ab initio calculation of the Zn K-edge XAS aimed at determining the influence of the different coordination induced by the capping. The results suggest that the observed differences of the XAS spectra are due to the formation of a well-defined interface between the oxide NPs and the capping molecules. The appearance of magnetism should be related to the modifications induced in the NPs by the surface bonds between Zn and the capping molecule.

Type
Contributed paper
Information
Diamond Light Source Proceedings , Volume 1 , Issue SRMS-7 , October 2010 , e143
Copyright
Copyright © Diamond Light Source Ltd 2011

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References

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