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Morphology and optical characteristics of hybrid matrix films with incorporated silver nanoparticles♣

H. HRISTOV1,* , P. VASILEVA1, N. RISKOV1, C. DUSHKIN1

Affiliation

  1. Laboratory of Nanoparticle Science and Technology, Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Sofia, 1 James Bourchier Blvd., 1164 Sofia, Bulgaria

Abstract

A simple procedure for the creation of thick hybrid films with metal nanoparticles is described. Ex-situ synthesized silver nanoparticles are incorporated in three hybrid matrix solutions, prepared by a sol-gel process. The hybrid matrix films, composed of PVA-PEG-B2O3, PVA-PEG-SiO2 and PVA-PEG-SiO2-B2O3, with and without incorporated silver nanoparticles, are obtained by a solution casting method at ambient temperature. The films with incorporated silver nanoparticles possess a yellow colour and a transparency suitable for optical applications. The structural interactions, surface morphology and optical properties of films are studied. The morphology of the films and the homogeneity of distribution and stability of the silver nanoparticles are strongly influenced by the components of the matrices. The silver nanoparticles aggregate completely in the pores of a porous polymer-borate hybrid film. The most homogeneous distribution of nanoparticles is observed in dense hybrid films containing silica..

Keywords

Hybrid sol-gel matrices, Silver nanoparticles, Thick films, Surface plasmon.

Submitted at: Nov. 5, 2008
Accepted at: Sept. 9, 2009

Citation

H. HRISTOV, P. VASILEVA, N. RISKOV, C. DUSHKIN, Morphology and optical characteristics of hybrid matrix films with incorporated silver nanoparticles♣, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 9, pp. 1343-1346 (2009)