Rivero Fuente, Pedro J.Goicoechea Fernández, JavierUrrutia Azcona, AitorMatías Maestro, IgnacioArregui San Martín, Francisco Javier2014-06-242014-06-2420131931-7573 (print)1556-276X (electronic)129910.1186/1556-276X-8-438https://academica-e.unavarra.es/handle/2454/10964UPNa. Departamento de Ingeniería Eléctrica y Electrónica. Laboratorio de Dispositivos Ópticos NanoestructuradosIn the present study, we show that silver nanoparticles (AgNPs) with different shape, aggregation state and color (violet, green, orange) have been successfully incorporated into polyelectrolyte multilayer thin films using the layerby- layer (LbL) assembly. In order to obtain colored thin films based on AgNPs is necessary to maintain the aggregation state of the nanoparticles, a non-trivial aspect in which this work is focused on. The use of Poly(acrylic acid, sodium salt) (PAA) as a protective agent of the AgNPs is the key element to preserve the aggregation state and makes possible the presence of similar aggregates (shape and size) within the LbLcolored films. This approach based on electrostatic interactions of the polymeric chains and the immobilization of AgNPs with different shape and size into the thin films opens up a new interesting perspective to fabricate multicolornanocomposites based on AgNPs.application/pdfeng© 2013 Rivero et al.; licensee Springer. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Layer by layer assemblyMulticolor filmsSilver nanoparticlesinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess