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dc.contributor.author
Mendoza Herrera, Luis Joaquin
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Muñetón Arboleda, David
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Schinca, Daniel C.
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Scaffardi, Lucia Beatriz
dc.date.available
2017-01-25T21:31:30Z
dc.date.issued
2014-11
dc.identifier.citation
Mendoza Herrera, Luis Joaquin; Muñetón Arboleda, David; Schinca, Daniel C.; Scaffardi, Lucia Beatriz; Determination of plasma frequency, damping constant, and size distribution from the complex dielectric function of noble metal nanoparticles; American Institute Of Physics; Journal Of Applied Physics; 116; 23; 11-2014; 2331051-2331058
dc.identifier.issn
0021-8979
dc.identifier.uri
http://hdl.handle.net/11336/11972
dc.description.abstract
This paper develops a novel method for simultaneously determining the plasma frequency ωP  ωP   and the damping constant γfreeγfree in the bulk damped oscillator Drude model, based on experimentally measured real and imaginary parts of the metal refractive index in the IR wavelength range, lifting the usual approximation that restricts frequency values to the UV-deep UV region. Our method was applied to gold, silver, and copper, improving the relative uncertainties in the final values for ωpωp (0.5%–1.6%) and for γfreeγfree (3%–8%), which are smaller than those reported in the literature. These small uncertainties in ωpωp and γfreeγfree determination yield a much better fit of the experimental complex dielectric function. For the case of nanoparticles (Nps), a series expansion of the Drude expression (which includes ωpωp and γfreeγfree determined using our method) enables size-dependent dielectric function to be written as the sum of three terms: the experimental bulk dielectric function plus two size corrective terms, one for free electron, and the other for bound-electron contributions. Finally, size distribution of nanometric and subnanometric gold Nps in colloidal suspension was determined through fitting its experimental optical extinction spectrum using Mie theory based on the previously determined dielectric function. Results are compared with size histogram obtained from Transmission Electron Microscopy (TEM).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Institute Of Physics
dc.rights
info:eu-repo/semantics/openAccess
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Damping Constant
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Dielectric Function
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Noble Metals
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Óptica
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Determination of plasma frequency, damping constant, and size distribution from the complex dielectric function of noble metal nanoparticles
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-01-24T14:42:37Z
dc.journal.volume
116
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23
dc.journal.pagination
2331051-2331058
dc.journal.pais
Estados Unidos
dc.journal.ciudad
New York
dc.description.fil
Fil: Mendoza Herrera, Luis Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigaciones Opticas (i); Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Muñetón Arboleda, David. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigaciones Opticas (i); Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Schinca, Daniel C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigaciones Opticas (i); Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de La Plata. Facultad de Ingenieria; Argentina
dc.description.fil
Fil: Scaffardi, Lucia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigaciones Opticas (i); Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de La Plata. Facultad de Ingenieria; Argentina
dc.journal.title
Journal Of Applied Physics
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info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1063/1.4904349
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info:eu-repo/semantics/altIdentifier/url/http://aip.scitation.org/doi/10.1063/1.4904349