23 May 2005 Intensity based luminescent optical fiber oxygen sensor using quantum dots
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Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623643
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium
Abstract
The suitability of semiconductor nanoparticles to provide a reference signal in luminescence based chemical sensors is addressed. A CdSe-ZnS nanocrystal, with emission peak at 520 nm is used to provide a reference signal. Measurements of oxygen concentration, which are based on the dynamic quenching of the luminescence of a Ruthenium complex, are performed. Both dye and the nanocrystal are immobilized in a sol-gel matrix and are excited by a blue LED. Results are presented showing that the ratio between the reference and the sensor signals is highly insensitive to fluctuations of the excitation optical power. Preliminary results show that nanocrystals could be used to measure temperature and provide a reference signal.
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Pedro Jorge, Pedro Jorge, M. Mayeh, M. Mayeh, R. Benrashid, R. Benrashid, P. Caldas, P. Caldas, J. L. Santos, J. L. Santos, Faramarz Farahi, Faramarz Farahi, } "Intensity based luminescent optical fiber oxygen sensor using quantum dots", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623643; https://doi.org/10.1117/12.623643
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