{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:23:14Z","timestamp":1760242994842,"version":"build-2065373602"},"reference-count":29,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2015,4,27]],"date-time":"2015-04-27T00:00:00Z","timestamp":1430092800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, an NO2 optical fiber sensor is presented for pollution monitoring in road traffic applications. This sensor exploits the simultaneous transmission of visible light, as a measurement signal, and UV light, for the recovery of the NO2 sensitive materials. The sensor is based on a multimode fiber tip coated with a thin film of lutetium bisphthalocyanine (LuPc2). The simultaneous injection of UV light through the fiber is an improvement on the previously developed NO2 sensors and allows the simplification of the sensor head, rendering the external UV illumination of the film unnecessary. Coatings of different thicknesses were deposited on the optical fiber tips and the best performance was obtained for a 15 nm deposited thickness, with a sensitivity of 5.02 mV\/ppm and a resolution of  0.2 ppb in the range 0\u20135 ppm. The response and recovery times are not dependent on thickness, meaning that NO2 does not diffuse completely in the films.<\/jats:p>","DOI":"10.3390\/s150509870","type":"journal-article","created":{"date-parts":[[2015,4,27]],"date-time":"2015-04-27T12:16:51Z","timestamp":1430137011000},"page":"9870-9881","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Reversible NO2 Optical Fiber Chemical Sensor Based on LuPc2 Using Simultaneous Transmission of UV and Visible Light"],"prefix":"10.3390","volume":"15","author":[{"given":"Antonio","family":"Bueno","sequence":"first","affiliation":[{"name":"Service d'Electromagn\u00e9tisme et de T\u00e9l\u00e9communications, Universit\u00e9 de Mons, Boulevard Dolez 31, 7000 Mons, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Driss","family":"Lahem","sequence":"additional","affiliation":[{"name":"Materia Nova, Materials R&D Centre, Parc Initialis, Avenue Nicolas Copernic 1, 7000 Mons, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christophe","family":"Caucheteur","sequence":"additional","affiliation":[{"name":"Service d'Electromagn\u00e9tisme et de T\u00e9l\u00e9communications, Universit\u00e9 de Mons, Boulevard Dolez 31, 7000 Mons, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marc","family":"Debliquy","sequence":"additional","affiliation":[{"name":"Service de Science des Mat\u00e9riaux, Universit\u00e9 de Mons, Rue de l'Epargne 56, 7000 Mons, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2015,4,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1016\/S0269-7491(98)80026-2","article-title":"Global air emission inventories for anthropogenic sources of NOx, NH3 and N2O in 1990","volume":"102","author":"Olivier","year":"1998","journal-title":"Environ. 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