A fiber-optic localized surface plasmon resonance (LSPR) sensor anchored with metal organic framework (HKUST-1) film for acetone sensing

LiangLiang Liu; ChenYang He; Stephen P. Morgan; Ricardo Correia; Serhiy Korposh

doi:10.1117/12.2539413

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28 August 2019 A fiber-optic localized surface plasmon resonance (LSPR) sensor anchored with metal organic framework (HKUST-1) film for acetone sensing

LiangLiang Liu, ChenYang He, Stephen P. Morgan, Ricardo Correia, Serhiy Korposh

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Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111990Z (2019) https://doi.org/10.1117/12.2539413
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

A tip-based fiber-optic localized surface plasmon resonance (LSPR) sensor is reported for sensing of acetone. It is designed by coating the tip of multi-mode optical fiber with gold nanoparticles (size: ~ 40 nm) via a chemisorption process and further functionalization with a metal-organic framework (MOF) HKUST-1 via a layer-by-layer process. Two sensors with a different number of layers (80 and 120) corresponding to different thicknesses are reported. Both sensors show a redshift of resonance wavelength to acetone as a result of an increase in local refractive index induced by acetone adsorption into the HKUST-1 thin film. Sensors gradually saturate as acetone concentration increases and are fully reversible when the concentration decreases. The sensor with a thicker film exhibits slightly higher sensitivity to acetone than the thinner film with a wavelength shift of 5.27 nm for the concentration of 3.4 %.

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LiangLiang Liu, ChenYang He, Stephen P. Morgan, Ricardo Correia, and Serhiy Korposh "A fiber-optic localized surface plasmon resonance (LSPR) sensor anchored with metal organic framework (HKUST-1) film for acetone sensing", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990Z (28 August 2019); https://doi.org/10.1117/12.2539413

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