Size-dependent complex dielectric function of Ni, Mo, W, Pb, Zn and Na nanoparticles : Application to sizing

This work determines the size dependent metal nanoparticle (NP) dielectric function from a top-down approach using the bulk experimental refractive index as a starting point. Freeelectron damping constant (γ<sub>free</sub>) and plasma frequency (ω<sub>p</sub>) parameters in t...

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Autores principales:	Muñetón Arboleda, David, Santillán, Jesica María José, Mendoza Herrera, Luis Joaquín, Muraca, Diego, Schinca, Daniel Carlos, Scaffardi, Lucía Beatriz
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2016
Materias:	Ingeniería Ciencias Exactas Física Dielectric function Metal nanoparticles Size dependent optical properties
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/100043 https://ri.conicet.gov.ar/11336/49243 http://iopscience.iop.org/article/10.1088/0022-3727/49/7/075302/meta
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-100043
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ingeniería Ciencias Exactas Física Dielectric function Metal nanoparticles Size dependent optical properties
spellingShingle	Ingeniería Ciencias Exactas Física Dielectric function Metal nanoparticles Size dependent optical properties Muñetón Arboleda, David Santillán, Jesica María José Mendoza Herrera, Luis Joaquín Muraca, Diego Schinca, Daniel Carlos Scaffardi, Lucía Beatriz Size-dependent complex dielectric function of Ni, Mo, W, Pb, Zn and Na nanoparticles : Application to sizing
topic_facet	Ingeniería Ciencias Exactas Física Dielectric function Metal nanoparticles Size dependent optical properties
description	This work determines the size dependent metal nanoparticle (NP) dielectric function from a top-down approach using the bulk experimental refractive index as a starting point. Freeelectron damping constant (γ<sub>free</sub>) and plasma frequency (ω<sub>p</sub>) parameters in the Drude model are calculated for nickel (Ni), molybdenum (Mo), tungsten (W), lead (Pb), zinc (Zn) and sodium (Na) using a method developed in our group. Determined γ<sub>free</sub> and ω<sub>p</sub> parameters allow to develop an expression that improves the precision in reproducing the discrete metal bulk dielectric function in a wide wavelength range (UV-FIR). The bulk dielectric function is modified for describing the nanometric case by adding size corrective terms for free and bound electrons contributions. As an application of this study we characterize Ni spherical NPs synthesized by ultrafast laser ablation of a solid target in water. Using Mie theory together with the size-dependent dielectric function, we theoretically reproduce its experimental extinction spectrum. From this fitting, composition and size distribution of the particles in the colloidal suspension may be derived. Transmission electron microscopy (TEM) results agree with the sizes and structure derived from optical extinction spectroscopy (OES).
format	Articulo Articulo
author	Muñetón Arboleda, David Santillán, Jesica María José Mendoza Herrera, Luis Joaquín Muraca, Diego Schinca, Daniel Carlos Scaffardi, Lucía Beatriz
author_facet	Muñetón Arboleda, David Santillán, Jesica María José Mendoza Herrera, Luis Joaquín Muraca, Diego Schinca, Daniel Carlos Scaffardi, Lucía Beatriz
author_sort	Muñetón Arboleda, David
title	Size-dependent complex dielectric function of Ni, Mo, W, Pb, Zn and Na nanoparticles : Application to sizing
title_short	Size-dependent complex dielectric function of Ni, Mo, W, Pb, Zn and Na nanoparticles : Application to sizing
title_full	Size-dependent complex dielectric function of Ni, Mo, W, Pb, Zn and Na nanoparticles : Application to sizing
title_fullStr	Size-dependent complex dielectric function of Ni, Mo, W, Pb, Zn and Na nanoparticles : Application to sizing
title_full_unstemmed	Size-dependent complex dielectric function of Ni, Mo, W, Pb, Zn and Na nanoparticles : Application to sizing
title_sort	size-dependent complex dielectric function of ni, mo, w, pb, zn and na nanoparticles : application to sizing
publishDate	2016
url	http://sedici.unlp.edu.ar/handle/10915/100043 https://ri.conicet.gov.ar/11336/49243 http://iopscience.iop.org/article/10.1088/0022-3727/49/7/075302/meta
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Size-dependent complex dielectric function of Ni, Mo, W, Pb, Zn and Na nanoparticles : Application to sizing

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