A Novel Fiber-Optical Fabry–Perot Microtip Sensor for 2-Propanol
João M. Leça,
Paulo Antunes,
Florinda M. Costa,
António J. S. Teixeira,
Marta S. Ferreira
Affiliations
João M. Leça
Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N) and Physics Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
Paulo Antunes
Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N) and Physics Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
Florinda M. Costa
Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N) and Physics Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
António J. S. Teixeira
Institute of Electronics and Informatics Engineering of Aveiro (IEETA), Department of Electronics, Telecommunications and Informatics, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
Marta S. Ferreira
Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N) and Physics Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
2-Propanol in the gaseous phase of clinical samples can serve as a biomarker for disease diagnosis. In this context, a novel fiber-optic Fabry–Perot (FP) interferometric sensor with a microtip structure was developed using the light-guided induced polymerization technique. The optical fiber sensor (OFS) with the best performance, measuring approximately 15 µm in length, exhibited good sensitivity to 2-propanol, with a response of −71.1 ± 2.1 pm/ppm. Additionally, it demonstrated good stability, with a maximum standard deviation of 0.15 nm and an estimated resolution of 3.18 ppm. The good sensitivity and ease of fabrication of this OFS highlight its potential for biomedical applications, particularly in non-invasive disease detection, given the role of 2-propanol as a biomarker for various health conditions.
