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Synthesis, optical properties, and modeling of silver core/silver oxide shell nanostructures in silica films
Author(s): Víctor M. Rentería-Tapia; Guadalupe Valverde-Aguilar; Jorge A. García-Macedo
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Paper Abstract

Sol-gel silica films containing silver ions were annealed in a rich-hydrogen atmosphere and subsequently in a rich-oxygen atmosphere. High resolution transmission electronic microscopy measurements shown unusual core-shell structures of silver-silver oxide nanoparticles in these films. The optical properties of these nanostructures exhibited red shift and damping in the UV-vis spectra. In order to calculate the optical properties were used the Mie theory using two approaches. The first one, corresponding to the core-shell model that includes a refractive index of the shell (ns) different to the one of the host matrix (nm). While in the second approach, we replaced in the Mie theory the refractive index of the environment (silica) by a local refractive index (nl) depending on the thickness of the silver oxide shell. Both calculations given the same results because they are equivalents.

Paper Details

Date Published: 22 September 2007
PDF: 7 pages
Proc. SPIE 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V, 66411W (22 September 2007); doi: 10.1117/12.730870
Show Author Affiliations
Víctor M. Rentería-Tapia, Univ. Nacional Autónoma de México (Mexico)
Guadalupe Valverde-Aguilar, Univ. Nacional Autónoma de México (Mexico)
Jorge A. García-Macedo, Univ. Nacional Autónoma de México (Mexico)

Published in SPIE Proceedings Vol. 6641:
Plasmonics: Metallic Nanostructures and Their Optical Properties V
Mark I. Stockman, Editor(s)

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