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oai:docta.ucm.es:20.500.14352/723172025-02-13T17:14:31Zcom_20.500.14352_14col_20.500.14352_15

3D Printing Filaments Facilitate the Development of Evanescent Wave Plastic Optical Fiber (POF) Chemosensors Darder Amengual, María Del Mar Serrano, Luis Bedoya, Maximino Orellana Moraleda, Guillermo 547 3D printing filaments plastic optical fiber evanescent wave formaldehyde sensor Química orgánica (Química) 2306 Química Orgánica One of the major difficulties in the development of evanescent wave optical fiber sensors (EWOFS) lies in the complexity of the manufacturing of the chemosensitive element, particularly when using plastic optical fibers (POFs). While these fibers are appealing waveguides thanks to their low cost, ease of connectorization and robustness, the need for removing the cladding material complicates the EWOFS fabrication. In this paper we discuss how 3D printing filaments can serve as an alternative to commercially available POF for the development of EWOFS. In the process of replacing the traditional POF, we compared the performance of two EWOFS for monitoring airborne formaldehyde. These sensitive elements were manufactured either from 1.75 mm diameter 3D printing filaments, or from a commercially available POF. After the optimization of their respective fabrication protocols, the analytical performance of the two formaldehyde EWOFS was compared in terms of sensitivity and reproducibility. In this regard, the easy-to-manufacture 3D printing filament-based waveguides provided 5-fold lower detection limits with respect to the commercial POF-based sensors. Although no statistically significant differences were found in terms of reproducibility, the simplification of the sensor manufacturing process together with the increased analytical performance for chemical sensing spur the use of 3D printing filaments for the development of new POF-based EWOFS. EU-LIFE Program Depto. de Química Orgánica Fac. de Ciencias Químicas TRUE pub 2023-06-22T11:19:28Z 2023-06-22T11:19:28Z 2022 journal article https://hdl.handle.net/20.500.14352/72317 2227-9040 10.3390/chemosensors10020061 eng (“Sensor System for Safe Environments in Industry—SENSSEI”; LIFE16-ENV_ES_00232; http://www.lifesenssei.com) Atribución 3.0 España https://creativecommons.org/licenses/by/3.0/es/ open access application/pdf MDPI