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A fiber-optic localized surface plasmon resonance (LSPR) sensor anchored with metal organic framework (HKUST-1) film for acetone sensing
Author(s): LiangLiang Liu; ChenYang He; Stephen P. Morgan; Ricardo Correia; Serhiy Korposh
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Paper 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 %.

Paper Details

Date Published: 28 August 2019
PDF: 5 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990Z (28 August 2019); doi: 10.1117/12.2539413
Show Author Affiliations
LiangLiang Liu, Univ. of Nottingham (United Kingdom)
ChenYang He, Univ. of Nottingham (United Kingdom)
Stephen P. Morgan, Univ. of Nottingham (United Kingdom)
Ricardo Correia, Univ. of Nottingham (United Kingdom)
Serhiy Korposh, Univ. of Nottingham (United Kingdom)


Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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