Photoinduced Electron Transfer Based Ion Sensing within an Optical Fiber

Sensors

Florian V. Englich¹  Tze Cheung Foo²  Andrew C. Richardson²  Heike Ebendorff-Heidepriem²  Christopher J. Sumby² 

[1] Institute for Photonics & Advanced Sensing (IPAS) and School of Chemistry & Physics, The University of Adelaide, North Terrace, SA 5005, Australia;

关键词: fluorescence sensor;    fiber-optic sensor;    microstructured optical fiber (MOF);    photo induced electron transfer (PET);    metal ion;   

DOI  :  10.3390/s111009560

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.