Browsing Comunicaciones y ponencias de congresos INAMAT2 - INAMAT2 biltzarretako komunikazioak eta txostenak by Author "Arregui San Martín, Francisco Javier"
(MDPI, 2021-07-07) Martínez Hernández, María Elena; Sandúa Fernández, Xabier; Rivero Fuente, Pedro J.; Goicoechea Fernández, Javier; Arregui San Martín, Francisco Javier; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza; Institute of Smart Cities - ISC; Ingeniería; Ingeniaritza; Institute for Advanced Materials and Mathematics - INAMAT2; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
In this work, an optical fiber sensor based on the localized surface plasmon resonance
(LSPR) phenomenon is presented as a powerful tool for the detection of heavy metals (Hg2+). The
resultant sensing film was fabricated using a nanofabrication process, known as layer-by-layer
embedding (LbL-E) deposition technique. In this sense, both silver nanoparticles (AgNPs) and gold
nanoparticles (AuNPs) were synthesized using a synthetic chemical protocol as a function of a strict
control of three main parameters: polyelectrolyte concentration, loading agent, and reducing agent.
The use of metallic nanostructures as sensing materials is of great interest because well-located
absorption peaks associated with their LSPR are obtained at 420 nm (AgNPs) and 530 nm (AuNPs).
Both plasmonic peaks provide a stable real-time reference that can be extracted from the spectral
response of the optical fiber sensor, giving a reliable monitoring of the Hg2+ concentration.