Fiber-optic carbon dioxide sensor based on fluorinated xerogels doped with HPTS

Yu-Lung Lo; Chen-Shane Chu

doi:10.1117/12.784801

16 May 2008 Fiber-optic carbon dioxide sensor based on fluorinated xerogels doped with HPTS

Yu-Lung Lo, Chen-Shane Chu

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.

Citation Download Citation

Yu-Lung Lo and 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); https://doi.org/10.1117/12.784801

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