3 March 2014 Metal-clad optical waveguide fluorescence device for the detection of heavy metal ions
Author Affiliations +
Abstract
We developed Hg 2+ -sensing chips by decorating the external surface of metal-clad optical waveguides with a monolayer of Hg 2+ -sensitive fluorescent molecular probes. The emission properties of the original water-soluble form of the molecule were previously found to be selectively quenched in the presence of Hg 2+ ions. The fabricated samples were tested with optical waveguide fluorescence spectroscopy by putting them in contact with a 5-μM water solution of Hg 2+ ions and recording the emission spectra versus incubation time. The estimate of the limit of detection was 150 nM. A preliminary evaluation of the selectivity of the structure was also performed by using Cd 2+ as possible interfering analytes.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Giancarlo Margheri, Emilia Giorgetti, Paolo Marsili, Angela Zoppi, Luisa Lascialfari, Stefano Cicchi, "Metal-clad optical waveguide fluorescence device for the detection of heavy metal ions," Optical Engineering 53(7), 071816 (3 March 2014). https://doi.org/10.1117/1.OE.53.7.071816 . Submission:
JOURNAL ARTICLE
9 PAGES


SHARE
Back to Top