Highly sensitive and linear optical fiber carbon dioxide sensor based on sol-gel matrix doped with silica particles and HPTS

Yu-Lung Lo; Chen-Shane Chu

doi:10.1117/12.833521

5 October 2009 Highly sensitive and linear optical fiber carbon dioxide sensor based on sol-gel matrix doped with silica particles and HPTS

Yu-Lung Lo, Chen-Shane Chu

Author Affiliations +

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75031D (2009) https://doi.org/10.1117/12.833521
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

This paper presents a high-performance fiber-optic carbon dioxide (CO₂) sensor based on sol-gel matrix composed of n-octyltriethoxysilane (Octyl-triEOS)/tetraethylorthosilane (TEOS) doped with pH-sensitive fluorescent dye and silica particles. The sensor film consists of 1-hydroxy-3,6,8-pyrenetrisulfonic acid trisodium salt (HPTS, PTS-), silica particles, tetraoctylammonium cation (TOA+), and a tetraoctylammonium hydroxide (TOAOH) phase transfer agent (i.e. the base) immobilized within the sol-gel matrix. The sensor has a sensitivity of approximately 26 and exhibits a uniquely linear response for CO₂ concentrations in the range 0~100 %. The response time of the sensor is 9.8 s when switching from a pure N2 atmosphere to a pure CO₂ atmosphere and 195.4 s when switching from CO₂ to N₂.

Citation Download Citation

Yu-Lung Lo and Chen-Shane Chu "Highly sensitive and linear optical fiber carbon dioxide sensor based on sol-gel matrix doped with silica particles and HPTS", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75031D (5 October 2009); https://doi.org/10.1117/12.833521

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