16 May 2008 Fiber-optic carbon dioxide sensor based on fluorinated xerogels doped with HPTS
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Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70040P (2008) https://doi.org/10.1117/12.784801
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia
Abstract
This paper presents a high-performance fiber-optic carbon dioxide (CO2) sensor based on hybrid xerogels composed of alkyl and perfluoroalkyl ORMOSILs (organically modified silicates) doped with pH-sensitive fluorescent dye. The sensor film consists of 1-hydroxy-3,6,8-pyrenetrisulfonic acid trisodium salt (HPTS, PTS-), tetraoctylammonium cation (TOA+), and a tetraoctylammonium hydroxide (TOAOH) phase transfer agent (i.e. the base) immobilized within the hybrid xerogels. The sensor has a sensitivity of approximately 18 and exhibits a linear response for CO2 concentrations in the range 0 ~ 30 %. The response time of the sensor is 1.7 s when switching from a pure nitrogen atmosphere to a pure CO2 atmosphere and 38.5 s when switching from CO2 to nitrogen.
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Yu-Lung Lo, Chen-Shane Chu, "Fiber-optic carbon dioxide sensor based on fluorinated xerogels doped with HPTS", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70040P (16 May 2008); doi: 10.1117/12.784801; https://doi.org/10.1117/12.784801
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