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Proceedings Paper

Structure, configuration, and sizing of Ni nanoparticles generated by ultrafast laser ablation in different media
Author(s): D. Muñetón Arboleda; J. M. J. Santillán; L. J. Mendoza Herrera; M. B. Fernández van Raap; D. Muraca; D. C. Schinca; L. B. Scaffardi
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Paper Abstract

In recent years, nickel nanoparticles (NPs) have increased scientific interest because of their extensive prospects in catalysts, information storage, large-scale batteries and biomedicine. Several works on Ni NPs generation by laser ablation have appeared in the literature in the last years, using different pulsed laser regimes and different media have been published recently. In this work we analyze the characteristics of species, structure (bare core or core-shell), configuration and size distribution of NPs generated by fs pulse laser ablation over a Ni solid target in n-heptane and water. We explore the presence of NiO-Ni core-shell and hollow Ni (or air-Ni) NPs in the colloids obtained. These were experimentally characterized using AFM and TEM microscopy, as well as Optical Extinction Spectroscopy (OES). Extinction spectra were modeled using Mie theory through an appropriate modification of the complex experimental dielectric function, taking into account a size-dependent corrective term for each free and bound electron contribution. Experimental UVvisible- NIR spectra were reproduced considering a size distribution of bare core, hollow and core-shell structures NPs. In both media, Ni NPs shape and size distribution agrees with that derived from TEM and AFM analysis.

Paper Details

Date Published: 28 August 2015
PDF: 9 pages
Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 95473J (28 August 2015); doi: 10.1117/12.2190421
Show Author Affiliations
D. Muñetón Arboleda, Ctr. de Investigaciones Ópticas (Argentina)
J. M. J. Santillán, Ctr. de Investigaciones Ópticas (Argentina)
Univ. Nacional de Catamarca (Argentina)
L. J. Mendoza Herrera, Ctr. de Investigaciones Ópticas (Argentina)
M. B. Fernández van Raap, Univ. Nacional de la Plata (Argentina)
Facultad de Ciencias Exactas (Argentina)
D. Muraca, Univ. Estadual de Campinas (Brazil)
D. C. Schinca, Ctr. de Investigaciones Ópticas (Argentina)
Univ. Nacional de la Plata (Argentina)
L. B. Scaffardi, Ctr. de Investigaciones Ópticas (Argentina)
Univ. Nacional de la Plata (Argentina)

Published in SPIE Proceedings Vol. 9547:
Plasmonics: Metallic Nanostructures and Their Optical Properties XIII
Allan D. Boardman; Din Ping Tsai, Editor(s)

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