Synthesis, optical properties, and modeling of silver core/silver oxide shell nanostructures in silica films

Víctor M. Rentería-Tapia; Guadalupe Valverde-Aguilar; Jorge A. García-Macedo

doi:10.1117/12.730870

22 September 2007 Synthesis, optical properties, and modeling of silver core/silver oxide shell nanostructures in silica films

Víctor M. Rentería-Tapia, Guadalupe Valverde-Aguilar, Jorge A. García-Macedo

Author Affiliations +

Proceedings Volume 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V; 66411W (2007) https://doi.org/10.1117/12.730870
Event: NanoScience + Engineering, 2007, San Diego, California, United States

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 (n_s) different to the one of the host matrix (n_m). While in the second approach, we replaced in the Mie theory the refractive index of the environment (silica) by a local refractive index (n_l) depending on the thickness of the silver oxide shell. Both calculations given the same results because they are equivalents.

Citation Download Citation

Víctor M. Rentería-Tapia, Guadalupe Valverde-Aguilar, and Jorge A. García-Macedo "Synthesis, optical properties, and modeling of silver core/silver oxide shell nanostructures in silica films", Proc. SPIE 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V, 66411W (22 September 2007); https://doi.org/10.1117/12.730870

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