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Sensors 2011, 11(10), 9560-9572; doi:10.3390/s111009560
Article

Photoinduced Electron Transfer Based Ion Sensing within an Optical Fiber

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Institute for Photonics & Advanced Sensing (IPAS) and School of Chemistry & Physics, The University of Adelaide, North Terrace, SA 5005, Australia
* Author to whom correspondence should be addressed.
Received: 8 September 2011 / Revised: 5 October 2011 / Accepted: 7 October 2011 / Published: 11 October 2011
(This article belongs to the Section Chemical Sensors)
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Abstract

We combine suspended-core microstructured optical fibers with the photoinduced electron transfer (PET) effect to demonstrate a new type of fluorescent optical fiber-dip sensing platform for small volume ion detection. A sensor design based on a simple model PET-fluoroionophore system and small core microstructured optical fiber capable of detecting sodium ions is demonstrated. The performance of the dip sensor operating in a high sodium concentration regime (925 ppm Na+) and for lower sodium concentration environments (18.4 ppm Na+) is explored and future approaches to improving the sensor’s signal stability, sensitivity and selectivity are discussed.
Keywords: fluorescence sensor; fiber-optic sensor; microstructured optical fiber (MOF); photo induced electron transfer (PET); metal ion fluorescence sensor; fiber-optic sensor; microstructured optical fiber (MOF); photo induced electron transfer (PET); metal ion
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Englich, F.V.; Foo, T.C.; Richardson, A.C.; Ebendorff-Heidepriem, H.; Sumby, C.J.; Monro, T.M. Photoinduced Electron Transfer Based Ion Sensing within an Optical Fiber. Sensors 2011, 11, 9560-9572.

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