Elosúa Aguado, CésarBariáin Aisa, CándidoMatías Maestro, IgnacioRodríguez, AntonioColacio, EnriqueSalinas Castillo, AlfonsoSegura Carretero, AntonioFernández Gutiérrez, Alberto2014-05-262014-05-2620081424-822077010.3390/s8020847https://academica-e.unavarra.es/handle/2454/10604An optical fibre sensor has been implemented towards pyridine vapors detection; to achieve this, a novel vapochromic material has been used, which, in solid state, suffers a change in colour from blue to pink-white in presence of pyridine vapours. This complex is added to a solution of PVC (Poly Vinyl Chloride), TBP (Tributylphosphate) and tetrahydrofuran (THF), forming a plasticized matrix; by dip coating technique, the sensing material is fixed onto a cleaved ended optical fibre. The fabrication process was optimized in terms of number of dips and dipping speed, evaluating the final devices by dynamic range. Employing a reflection set up, the absorbance spectra and changes in the reflected optical power of the sensors were registered to determine their response. A linear relation between optical power versus vapor concentration was obtained, with a detection limit of 1 ppm (v/v).application/pdfeng© 2008 by MDPI. CC Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)Fiber optic sensorsPyridine vapors sensorsVapochromic cobalt complexDip coating techniqueElectronic nosesSensitivityGasesFilmsDYEinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess