{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,1]],"date-time":"2026-02-01T20:48:03Z","timestamp":1769978883551,"version":"3.49.0"},"reference-count":51,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2018,3,1]],"date-time":"2018-03-01T00:00:00Z","timestamp":1519862400000},"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 article, we describe a NO2 sensor consisting of a coating based on lutetium bisphthalocyanine (LuPc2) in mesoporous silica. The sensor exploits the absorption spectrum change of this material which strongly and reversibly decreases in contact with NO2. NO2 is measured by following the amplitude change in the reflected spectrum of the coating deposited on the tip of a silica fibre. As diffusion of NO2 in LuPc2 is slow, the response time could be slow. To reduce it, the active molecules are dispersed in a mesoporous silica matrix deposited by a sol-gel process (Evaporation Induced Self Assembly) avoiding the formation of large crystals. Doing so, the response is fairly fast. As the recovery is slow at room temperature, the recovery time is reduced by exposure to UV light at 365 nm. This UV light is directly introduced in the fibre yielding a practical sensor sensitive to NO2 in the ppm range suitable for pollution monitoring.<\/jats:p>","DOI":"10.3390\/s18030740","type":"journal-article","created":{"date-parts":[[2018,3,1]],"date-time":"2018-03-01T12:15:44Z","timestamp":1519906544000},"page":"740","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Optical Fibre NO2 Sensor Based on Lutetium Bisphthalocyanine in a Mesoporous Silica Matrix"],"prefix":"10.3390","volume":"18","author":[{"given":"Marc","family":"Debliquy","sequence":"first","affiliation":[{"name":"Service de Science des Mat\u00e9riaux, Facult\u00e9 Polytechnique, Universit\u00e9 de Mons, 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":"Antonio","family":"Bueno-Martinez","sequence":"additional","affiliation":[{"name":"Service d\u2019Electromagn\u00e9tisme et de T\u00e9l\u00e9communications, Facult\u00e9 Polytechnique, Universit\u00e9 de Mons, 7000 Mons, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christophe","family":"Caucheteur","sequence":"additional","affiliation":[{"name":"Service d\u2019Electromagn\u00e9tisme et de T\u00e9l\u00e9communications, Facult\u00e9 Polytechnique, Universit\u00e9 de Mons, 7000 Mons, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2272-6633","authenticated-orcid":false,"given":"Marcel","family":"Bouvet","sequence":"additional","affiliation":[{"name":"Institut de Chimie Mol\u00e9culaire de l\u2019Universit\u00e9 de Bourgogne, UMR CNRS 6302 Univ. Bourgogne Franche-Comt\u00e9, 21078 Dijon, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Isaline","family":"Recloux","sequence":"additional","affiliation":[{"name":"Service de Science des Mat\u00e9riaux, Facult\u00e9 Polytechnique, Universit\u00e9 de Mons, 7000 Mons, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jean-Pierre","family":"Raskin","sequence":"additional","affiliation":[{"name":"Institut ICTEAM, Universit\u00e9 catholique de Louvain-la-Neuve, 1348 Louvain-la-Neuve, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marie-Georges","family":"Olivier","sequence":"additional","affiliation":[{"name":"Service de Science des Mat\u00e9riaux, Facult\u00e9 Polytechnique, Universit\u00e9 de Mons, 7000 Mons, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,3,1]]},"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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