Martínez Hernández, María ElenaGoicoechea Fernández, JavierRivero Fuente, Pedro J.Arregui San Martín, Francisco Javier2022-07-202022-07-202022Martínez-Hernández, M. E.; Goicoechea-Fernández, J.; Rivero-Fuente, P. J.; Arregui, F. J. (2022). In situ synthesis of gold nanoparticles in layer-b y-layer polymeric coatings for the fabrication of optical fiber sensors. Polymers. 14,42073-436010.3390/polym14040776https://academica-e.unavarra.es/handle/2454/43366A new method is proposed to tune the interferometric response of wavelength-based optical fiber sensors. Using the nanoparticle in situ synthesis (ISS) technique, it is possible to synthesize gold nanoparticles (AuNPs) within a pre-existing polymeric thin film deposited at the end-face of an optical fiber. This post-process technique allows us to adjust the optical response of the device. The effect of the progressive synthesis of AuNPs upon polymeric film contributed to a remarkable optical contrast enhancement and a very high tuning capability of the reflection spectra in the visible and near-infrared region. The spectral response of the sensor to relative humidity (RH) variations was studied as a proof of concept. These results suggest that the ISS technique can be a useful tool for fiber optic sensor manufacturing.11 p.application/pdfapplication/zipeng© 2022 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) licenseGold nanoparticlesIn situ synthesisInfraredInterferometric responseOptical fiber tipPolymersRelative humidityArtículo / Artikulua2022-07-18Acceso abierto / Sarbide irekiainfo:eu-repo/semantics/openAccess