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Dinitrobenzene sensing utilizing chitosan-based thin films optical fluorescence sensors via linear and nonlinear excitation


Citation

Yusufu, Abdullahi Magaji and Muhammad Noor, Ahmad Shukri and Mohd Azami, Hazwani Nadirah and Tamchek, Nizam and Zainal Abidin, Zurina (2015) Dinitrobenzene sensing utilizing chitosan-based thin films optical fluorescence sensors via linear and nonlinear excitation. In: 2015 9th International Conference on Sensing Technology (ICST 2015), 8-10 Dec. 2015, Auckland, New Zealand. (pp. 629-633).

Abstract

We presented here the findings of linear and nonlinear excitation of an optical fluorescence sensor enhanced with chitosan-based thin films coated on tapered optical fiber for detecting of dinitrobenzene solution compound. The absorbance peak of linear excitation at 441.2 nm shows a small shift to from 540.8 nm to 541.3 nm when 0.003g/ml dinitrobenzene was diluted in acetone. Time resolved fluorescence resulting in decreasing of fluorescence intensities was recorded for both linear and nonlinear excitation. Both showed an agreement of quenching of fluorescence up to 30% of its initial fluorescence due to the free electron transfer from chitosan thin film to the dinitrobenzene. Nonlinear excitation gives more rapid time-resolved florescence after 4 minutes compared to 6 minutes in linear excitation.


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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Engineering
Faculty of Science
DOI Number: https://doi.org/10.1109/ICSensT.2015.7438474
Publisher: IEEE
Keywords: Chitosan; Dinitrobenzene; Linear excitation; Nonlinear excitation; Optical time-resolved fluorescence sensor
Depositing User: Nabilah Mustapa
Date Deposited: 03 Aug 2016 08:05
Last Modified: 17 Mar 2020 07:11
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1109/ICSensT.2015.7438474
URI: http://psasir.upm.edu.my/id/eprint/48115
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