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Silver Cluster Formation in Implanted A12O3 Single Crystals

Published online by Cambridge University Press:  21 February 2011

F.L. Freire Jr. ,
N. Broil  and
G. Mariotto
F.L. Freire Jr.
Affiliation:
Departamento de Fisica, PUC-Rio, Rio de Janeiro, 22452, Brazil
N. Broil
Affiliation:
INFM and Dipartimento di Fisica, Università di Trento, 38050, Italy
G. Mariotto
Affiliation:
INFM and Dipartimento di Fisica, Università di Trento, 38050, Italy
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Abstract

Single crystals of sapphire were implanted at room temperature with 300 keV-Ag+. The metal precipitate was characterized by a multitechnique approach including RBS, optical absorption and Raman spectroscopy. RBS measurements were used to determine the depth-profiles of the implanted ions. Ag depth profiles, derived from RBS are in good agreement with the results predicted by Monte Carlo simulations. Linear absorption spectroscopy has been used to characterize the effects of the ion fluence on the optical properties of the metal colloids in the UV-Vis region. The broad absorption band due to the surface plasmon resonance shows an appreciable red-shift when the fluence of bombarding ions increases. Raman scattering from acoustic vibrations of the silver clusters progressively shifts toward the laser frequency with increasing implantation dose. From low-frequency Raman spectra an evaluation of the average size of metal aggregates was derived.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 396: Symposium A – Ion-Solid Interactions for Materials Modification and Processing , 1995 , 385
Copyright
Copyright © Materials Research Society 1996

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