Modeling of core-shell silver nanoparticles in nanostructured sol-gel thin films

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

doi:10.1117/12.730872

22 September 2007 Modeling of core-shell silver nanoparticles in nanostructured sol-gel thin films

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

Proceedings Volume 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V; 66411T (2007) https://doi.org/10.1117/12.730872
Event: NanoScience + Engineering, 2007, San Diego, California, United States

Abstract

Silver nanoparticles were obtained by UV radiation of silica films containing Ag⁺ ions. 2d-hexagonal nanostructured sol-gel thin films were prepared by dip-coating method using the non-ionic diblock copolymer Brij58 to produce channels into the film, which house the silver nanoparticles. An absorption band located at 438 nm was detected; it corresponds to the surface plasmon resonance. High resolution transmission electronic microscopy measurements show core-shell structures of silver-silver oxide nanoparticles in these sol-gel silica films. These optical properties were modeled and well fitted with the Gans theory considering refractive index higher than the one coming from host matrix. This index is explained because the silver oxide shell modifies the local surrounding medium of the metallic nanoparticles and therefore plays an important role in the optical properties of the films.

Citation Download Citation

Guadalupe Valverde-Aguilar, Víctor Rentería, and Jorge A. García-Macedo "Modeling of core-shell silver nanoparticles in nanostructured sol-gel thin films", Proc. SPIE 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V, 66411T (22 September 2007); https://doi.org/10.1117/12.730872

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