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12 November 2019 Planar optical sensor for trichlorofluoromethane
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Abstract
We demonstrate a planar-optical Bragg grating based chemical sensor device for the detection of the environmentally harmful, highly ozone-depleting-substance trichlorofluoromethane. By applying an approximately 100 nm thin layer of differently substituted cyclodextrin-derivatives on top of the sensitive region of the silica-based Bragg grating sensor, supramolecular host-guest interactions of the oligo-saccharide affinity material and the chlorofluorocarbon analyte are favored, leading to a significant increase of the sensitivity towards the airborne pollutant. The all-optical sensor thus allows a reliable online in-situ detection and measurement of trichlorofluoromethane in real-time that features a limit of detection of down to 25 ppm.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Maiko Girschikofsky, Dimitrij Ryvlin, Steffen Hessler, Siegfried R. Waldvogel, and Ralf Hellmann "Planar optical sensor for trichlorofluoromethane", Proc. SPIE 11197, SPIE Future Sensing Technologies, 111970E (12 November 2019); https://doi.org/10.1117/12.2542013
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