Optical carbon dioxide sensor based on the colorimetric change of α-naphtholphthalein and internal reference fluorescent CIS/ZnS QDs

Cheng-Shane Chu; Meng-Wei Hsieh

doi:10.1117/12.2255810

23 April 2017 Optical carbon dioxide sensor based on the colorimetric change of α-naphtholphthalein and internal reference fluorescent CIS/ZnS QDs

Cheng-Shane Chu, Meng-Wei Hsieh

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103231M (2017) https://doi.org/10.1117/12.2255810
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

A new optical carbon dioxide sensor based on the colormetric change of pH indicator α-naphtholphthalein with the internal reference fluorescent CIS/ZnS quantum dots (QDs) was developed. The luminescence intensity of CIS/ZnS QDs increased with increasing carbon dioxide concentration. The sensing films consisting of α-naphtholphthalein in polyIBM and CIS/ZnS QDs in polystyrene layer. The sensitivity of optical carbon dioxide sensor is quantified in terms of the ration I₁₀₀/I₀, where I₁₀₀ and I₀ represent the detected luminescence intensities in pure carbon dioxide and pure nitrogen environments, respectively. The experimental result reveals that the new optical carbon dioxide sensor has sensitivity of I₁₀₀/I₀=13.4.

Citation Download Citation

Cheng-Shane Chu and Meng-Wei Hsieh "Optical carbon dioxide sensor based on the colorimetric change of α-naphtholphthalein and internal reference fluorescent CIS/ZnS QDs", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103231M (23 April 2017); https://doi.org/10.1117/12.2255810

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