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Proceedings Paper

Optical carbon dioxide sensor based on the colorimetric change of α-naphtholphthalein and internal reference fluorescent CIS/ZnS QDs
Author(s): Cheng-Shane Chu; Meng-Wei Hsieh
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Paper 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.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103231M (23 April 2017); doi: 10.1117/12.2255810
Show Author Affiliations
Cheng-Shane Chu, Ming Chi Univ. of Technology (Taiwan)
Meng-Wei Hsieh, Ming Chi Univ. of Technology (Taiwan)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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