Detection of volatile organic compounds (VOCs) using an optical fibre long period grating with a calixarene anchored mesoporous thin film

S. Korposh; F. Davis; S. W. James; T. Wang; S.-W. Lee; S. Higson; R. P. Tatam

doi:10.1117/12.2026270

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20 May 2013 Detection of volatile organic compounds (VOCs) using an optical fibre long period grating with a calixarene anchored mesoporous thin film

S. Korposh, F. Davis, S. W. James, T. Wang, S.-W. Lee, S. Higson, R. P. Tatam

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Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87941I (2013) https://doi.org/10.1117/12.2026270
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

A long period grating (LPG) modified with a mesoporous film infused with a functional compound, calix[4]arene, was employed for the detection of volatile organic compounds (VOCs). The mesoporous film consisted of an inorganic part, of SiO₂ nanoparticles (NPs) along with an organic moiety of poly(allylamine hydrochloride) polycation PAH, which was finally infused with functional compound, p-sulphanatocalix[4]arene (CA[4]). The LPG sensor was designed to operate at the phase matching turning point to provide the highest sensitivity. The sensing mechanism is based on the measurement of the refractive index (RI) change induced by the complexion of the VOCs with calix[4]arene (CA). The LPG modified with 5 cycles of (SiO₂ NPs/PAH)₅PAA responded to exposure to chloroform and benzene vapours. The sensitivity to humidity as an interfering parameter was also investigated.

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S. Korposh, F. Davis, S. W. James, T. Wang, S.-W. Lee, S. Higson, and R. P. Tatam "Detection of volatile organic compounds (VOCs) using an optical fibre long period grating with a calixarene anchored mesoporous thin film", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87941I (20 May 2013); https://doi.org/10.1117/12.2026270

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