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Core-Satellite Metallic Nanoclusters in Silica Obtained by Multiple Ion Beam Processing

Published online by Cambridge University Press:  01 February 2011

Giovanni Mattei ,
Valentina Bello ,
Paolo Mazzoldi ,
Giovanni Pellegrini ,
Chiara Maurizio  and
Giancarlo Battaglin
Giovanni Mattei
Affiliation:
giovanni.mattei@unipd.it, University of Padova, Department of Physics, via Marzolo 8, Padova, I-35131, Italy, +39.049.8277045, +39.049.8277003
Valentina Bello
Affiliation:
bello@padova.infm.it, University of Padova, Department of Physics, via Marzolo 8, Padova, I-35131, Italy
Paolo Mazzoldi
Affiliation:
paolo.mazzoldi@unipd.it, University of Padova, Department of Physics, via Marzolo 8, Padova, I-35131, Italy
Giovanni Pellegrini
Affiliation:
pellegrini@padova.infm.it, University of Padova, Department of Physics, via Marzolo 8, Padova, I-35131, Italy
Chiara Maurizio
Affiliation:
maurizio@esrf.fr, CNR-INFM, ESRF, GILDA-CRG, Rue Horowitz 6, B.P. 220, Grenoble, 38043, France
Giancarlo Battaglin
Affiliation:
battagli@unive.it, University of Venice, Department of Physical Chemistry, Dorsoduro 2137, Venice, I-30123, Italy
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Abstract

Ion irradiation has been used to transform spherical bimetallic AuAg nanocluster embedded in silica in a more complex structure made of a central cluster surrounded by a halo of smaller satellite nanoclusters, whose composition, size and distance from the central cluster can be tailored by controlling the irradiation parameters. This peculiar topology produces a red-shift of the surface plasma resonance of the composite through the electromagnetic coupling between the central cluster and the satellites. A calculation of the local field properties of the investigated systems within the fully-interacting generalized Mie theory showed that the satellite topology produces large local field enhancements around the central cluster.

Keywords

ion-implantationnanostructureoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1020: Symposium GG – Ion-Beam-Based Nanofabrication , 2007 , 1020-GG06-09
Copyright
Copyright © Materials Research Society 2007

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