Open Access Nano Express

A comparative study of two different approaches for the incorporation of silver nanoparticles into layer-by-layer films

Pedro Jose Rivero*, Javier Goicoechea, Ignacio Raul Matias and Francisco Javier Arregui

Author Affiliations

Nanostructured Optical Devices Laboratory, Electric and Electronic Engineering Department, Public University of Navarra, Edif. Los Tejos, Campus Arrosadía, Pamplona 31006, Spain

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Nanoscale Research Letters 2014, 9:301  doi:10.1186/1556-276X-9-301

Published: 13 June 2014

Abstract

In this work, a comparative study about the incorporation of silver nanoparticles (AgNPs) into thin films is presented using two alternative methods, the in situ synthesis process and the layer-by-layer embedding deposition technique. The influence of several parameters such as color of the films, thickness evolution, thermal post-treatment, or distribution of the AgNPs along the coatings has been studied. Thermal post-treatment was used to induce the formation of hydrogel-like AgNPs-loaded thin films. Cross-sectional transmission electron microscopy micrographs, atomic force microscopy images, and UV-vis spectra reveal significant differences in the size and distribution of the AgNPs into the films as well as the maximal absorbance and wavelength position of the localized surface plasmon resonance absorption bands before and after thermal post-treatment. This work contributes for a better understanding of these two approaches for the incorporation of AgNPs into thin films using wet chemistry.

Keywords:
Silver nanoparticles; Thin films; In situ synthesis process; Layer-by-layer embedding deposition technique