{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:07:26Z","timestamp":1760058446004,"version":"build-2065373602"},"reference-count":35,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,3,29]],"date-time":"2025-03-29T00:00:00Z","timestamp":1743206400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"PRR\u2014Plano de Recupera\u00e7\u00e3o e Resili\u00eancia under the Next Generation EU from the European Union","award":["C644919832-00000035","UIDB\/50025\/2020","UIDP\/50025\/2020","LA\/P\/0037\/2020"],"award-info":[{"award-number":["C644919832-00000035","UIDB\/50025\/2020","UIDP\/50025\/2020","LA\/P\/0037\/2020"]}]},{"name":"FCT\/MEC","award":["C644919832-00000035","UIDB\/50025\/2020","UIDP\/50025\/2020","LA\/P\/0037\/2020"],"award-info":[{"award-number":["C644919832-00000035","UIDB\/50025\/2020","UIDP\/50025\/2020","LA\/P\/0037\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>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\u2013Perot (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 \u00b5m in length, exhibited good sensitivity to 2-propanol, with a response of \u221271.1 \u00b1 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.<\/jats:p>","DOI":"10.3390\/s25072178","type":"journal-article","created":{"date-parts":[[2025,3,31]],"date-time":"2025-03-31T02:50:16Z","timestamp":1743389416000},"page":"2178","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Novel Fiber-Optical Fabry\u2013Perot Microtip Sensor for 2-Propanol"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1704-6745","authenticated-orcid":false,"given":"Jo\u00e3o M.","family":"Le\u00e7a","sequence":"first","affiliation":[{"name":"Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N) and Physics Department, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9129-3539","authenticated-orcid":false,"given":"Paulo","family":"Antunes","sequence":"additional","affiliation":[{"name":"Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N) and Physics Department, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8729-714X","authenticated-orcid":false,"given":"Florinda M.","family":"Costa","sequence":"additional","affiliation":[{"name":"Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N) and Physics Department, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7675-1236","authenticated-orcid":false,"given":"Ant\u00f3nio J. 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