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Proceedings Paper

Fluorescent-based chemical sensor for organophosphate detection
Author(s): Špela Korent Urek; Aleksandra Lobnik
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Paper Abstract

We present a new optical sensor for the detection of organophosphates by incorporating fluorescent indicator dye into sol-gel material. We used different configurations of immobilization matrices such as thin film and spherical nanoparticles. The sensor thin films were prepared by using acid-catalyzed sol-gel process and the spherical nanoparticles by modified Stöber method. The effects of configuration matrices on the sensor's characteristic were studied. The use of dye-doped nanoparticles improved the detection limit from 0.69 μM to 17 nM, response time from 600 s to 12 s, precision and sensitivity, but reduced the sensor's working rage from 6.9×10-7 M - 6.9×10-3 M to 1.75×10-8M - 2.3×10-7 M.

Paper Details

Date Published: 6 May 2011
PDF: 8 pages
Proc. SPIE 8073, Optical Sensors 2011; and Photonic Crystal Fibers V, 80730Y (6 May 2011); doi: 10.1117/12.887051
Show Author Affiliations
Špela Korent Urek, Institute of Environmental Protection and Sensors (Slovenia)
Aleksandra Lobnik, Univ. of Maribor (Slovenia)

Published in SPIE Proceedings Vol. 8073:
Optical Sensors 2011; and Photonic Crystal Fibers V
Kyriacos Kalli; Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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