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Xinyuan Chong; Ki-Joong Kim; Ohodnicki, Paul R.; Erwen Li; Chih-Hung Chang; Wang, Alan X.
IEEE sensors journal, 2015-Sept., 2015-9-00, Letnik: 15, Številka: 9Journal Article
In this paper, we report a fiber-optic carbon dioxide (CO 2 ) near-infrared (IR) absorption sensor with only 8-cm sensing length that is coated with nanoporous metalorganic framework material Cu-BTC (BTC = benzene-1,3, 5-tricarboxylate). The multimode optical fiber was etched by hydrofluoric acid to remove the cladding and part of the core, resulting in larger evanescent field to sense the near-IR absorption induced by the adsorbed CO 2 . The Cu-BTC thin film with 100 nm thickness was then grown onto the ethced core through a stepwise layer-by-layer method. Our real-time measurement results show that the CO 2 detection limit is better than 500 ppm and the overall response time is 40 s for absorption and 75 s for desorption. To the best of our knowledge, this is the shortest near-IR fiber-optic sensor for CO2 detection at 1.57-μm wavelength.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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