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Gold Nanoclusters Formed by Ion-Implantation into Bi2TeO5

Published online by Cambridge University Press:  17 March 2011

A. Kling ,
M.F. da Silva ,
J.C. Soares ,
P.F.P. Fichtner ,
L. Amaral ,
F.C. Zawislak ,
I. Földvári  and
Á. Péter
A. Kling
Affiliation:
Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal Centro de Física Nuclear da Universidade de Lisboa, 1649-003 Lisboa, Portugal
M.F. da Silva
Affiliation:
Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal Centro de Física Nuclear da Universidade de Lisboa, 1649-003 Lisboa, Portugal
J.C. Soares
Affiliation:
Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal Centro de Física Nuclear da Universidade de Lisboa, 1649-003 Lisboa, Portugal
P.F.P. Fichtner
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
L. Amaral
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
F.C. Zawislak
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
I. Földvári
Affiliation:
Research Laboratory for Crystal Physics, Hungarian Academy of Sciences, 1525 Budapest 114, Hungary
Á. Péter
Affiliation:
Research Laboratory for Crystal Physics, Hungarian Academy of Sciences, 1525 Budapest 114, Hungary
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Abstract

Single crystalline samples of bismuth tellurite (Bi2TeO5) were implanted with 800 keV Au+ions to a fluence of 1×1016 cm-2 at room temperature. The samples were subjected to heat treatments in two different ambients (air and high vacuum) at temperatures ranging from 400 - 700°C in a conventional furnace. Strong absorption maxima in the range from 600 - 630 nm in the optical absorption spectra and an intense blue-green color in the samples were observed for annealings performed in air at temperatures between 500 and 700°C indicating the formation of gold colloids. The average radii of the Au clusters formed were estimated to be in the range of 3-4 nm. Samples annealed under vacuum showed distinct changes in color for different annealing temperatures. Studies using the RBS/channeling technique indicate that no full recrystallization of the samples was achieved under both annealing regimes although heat treatment under vacuum provides a significantly better lattice recovery than for air ambient.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 647: Symposium O – Ion Beam Synthesis & Processing of Advanced Materials , 2000 , O5.14
Copyright
Copyright © Materials Research Society 2001

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