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Sensors 2015, 15(5), 9870-9881; doi:10.3390/s150509870

Reversible NO2 Optical Fiber Chemical Sensor Based on LuPc2 Using Simultaneous Transmission of UV and Visible Light

1
Service d'Electromagnétisme et de Télécommunications, Université de Mons, Boulevard Dolez 31, 7000 Mons, Belgium
2
Materia Nova, Materials R&D Centre, Parc Initialis, Avenue Nicolas Copernic 1, 7000 Mons, Belgium
3
Service de Science des Matériaux, Université de Mons, Rue de l'Epargne 56, 7000 Mons, Belgium
*
Author to whom correspondence should be addressed.
Academic Editor: Ki-Hyun Kim
Received: 23 January 2015 / Revised: 25 March 2015 / Accepted: 23 April 2015 / Published: 27 April 2015
(This article belongs to the Special Issue Modern Technologies for Sensing Pollution in Air, Water, and Soil)
View Full-Text   |   Download PDF [1340 KB, uploaded 27 April 2015]   |  

Abstract

In this paper, an NO2 optical fiber sensor is presented for pollution monitoring in road traffic applications. This sensor exploits the simultaneous transmission of visible light, as a measurement signal, and UV light, for the recovery of the NO2 sensitive materials. The sensor is based on a multimode fiber tip coated with a thin film of lutetium bisphthalocyanine (LuPc2). The simultaneous injection of UV light through the fiber is an improvement on the previously developed NO2 sensors and allows the simplification of the sensor head, rendering the external UV illumination of the film unnecessary. Coatings of different thicknesses were deposited on the optical fiber tips and the best performance was obtained for a 15 nm deposited thickness, with a sensitivity of 5.02 mV/ppm and a resolution of 0.2 ppb in the range 0–5 ppm. The response and recovery times are not dependent on thickness, meaning that NO2 does not diffuse completely in the films. View Full-Text
Keywords: optical fiber sensor; nitrogen dioxide; lutetium bisphthalocyanine; traffic pollution optical fiber sensor; nitrogen dioxide; lutetium bisphthalocyanine; traffic pollution
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Bueno, A.; Lahem, D.; Caucheteur, C.; Debliquy, M. Reversible NO2 Optical Fiber Chemical Sensor Based on LuPc2 Using Simultaneous Transmission of UV and Visible Light. Sensors 2015, 15, 9870-9881.

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