Gold-based nucleation in implanted silica studied by x-ray absorption spectroscopy. Maurizio, C., Cesca, T., Kalinic, B., Trapananti, A., Scian, C., Battaglin, G., Mazzoldi, P., & Mattei, G. CERAMICS INTERNATIONAL, 41:8660–8664, Elsevier Ltd, 2015. doi abstract bibtex Ion implantation into silica is used to produce Au subnanometer metal clusters, whose size can be finely tuned from few-atom to about 1 nm by acting on the implantation fluence and post-implantation annealing conditions. The structural analyses rely basically on x-ray absorption spectroscopy that can investigate the metal site independently from long range order considerations. Besides the signal from the intermetallic coordination, a correlation of the dopant with oxygen atoms from the matrix is found, especially upon implantation at low fluence. The possibility of promoting the formation of subnanometer AuAg clusters by sequential ion implantation is also explored, with promising preliminary results. The control of the metal cluster nucleation, composition and first steps of growth have relevant consequences on the interpretation of the optical emission spectra of these molecule-like clusters and on their sensitizing action towards nearby rare-earth ions embedded in the same matrix.
@article{
11577_3169260,
author = {Maurizio, Chiara and Cesca, Tiziana and Kalinic, Boris and Trapananti, A. and Scian, Carlo and Battaglin, G. and Mazzoldi, Paolo and Mattei, Giovanni},
title = {Gold-based nucleation in implanted silica studied by x-ray absorption spectroscopy},
year = {2015},
publisher = {Elsevier Ltd},
journal = {CERAMICS INTERNATIONAL},
volume = {41},
abstract = {Ion implantation into silica is used to produce Au subnanometer metal clusters, whose size can be finely tuned from few-atom to about 1 nm by acting on the implantation fluence and post-implantation annealing conditions. The structural analyses rely basically on x-ray absorption spectroscopy that can investigate the metal site independently from long range order considerations. Besides the signal from the intermetallic coordination, a correlation of the dopant with oxygen atoms from the matrix is found, especially upon implantation at low fluence. The possibility of promoting the formation of subnanometer AuAg clusters by sequential ion implantation is also explored, with promising preliminary results. The control of the metal cluster nucleation, composition and first steps of growth have relevant consequences on the interpretation of the optical emission spectra of these molecule-like clusters and on their sensitizing action towards nearby rare-earth ions embedded in the same matrix.},
keywords = {Cluster nucleation in silica; Cluster-matrix interaction; Ion implantation; XAS; Ceramics and Composites; Process Chemistry and Technology; Electronic, Optical and Magnetic Materials; Surfaces, Coatings and Films; Materials Chemistry2506 Metals and Alloys},
doi = {10.1016/j.ceramint.2015.03.078},
pages = {8660--8664}
}
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The structural analyses rely basically on x-ray absorption spectroscopy that can investigate the metal site independently from long range order considerations. Besides the signal from the intermetallic coordination, a correlation of the dopant with oxygen atoms from the matrix is found, especially upon implantation at low fluence. The possibility of promoting the formation of subnanometer AuAg clusters by sequential ion implantation is also explored, with promising preliminary results. 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