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Modified plastic optical fiber with CNT and graphene oxide nanostructured coatings for ethanol liquid sensing


Khalaf, Ahmed Lateef and M. Thirunavakkarasu, Punithavathi and Lim, H. N and Paiman, Suriati and Yusof, Nor Azah and Mahdi, Mohd Adzir and Yaacob, Mohd Hanif (2017) Modified plastic optical fiber with CNT and graphene oxide nanostructured coatings for ethanol liquid sensing. Optics Express, 25 (5). pp. 5509-5520. ISSN 1094-4087


A high sensitivity and simple ethanol sensor based on an un-cladded multimode plastic optical fiber (UCPOF) coated with carbon nanotubes (CNTs) for the detection of different concentrations of ethanol in de-ionized water is developed and demonstrated. The UCPOF probe is fabricated by chemically removing the fiber cladding and integrated with CNT as a sensing layer. The effect of surface morphology on the sensor performance is investigated by characterizing another UCPOF coated with GO nanomaterial. The developed fibers are coated with CNTs and GO using drop casting technique. Energy dispersive X-ray spectroscopy (EDX), atomic-force microscopy (AFM) and scanning electron microscope (SEM) are used to investigate the element and morphology of the synthesized nanomaterials. The experimental results indicated that the absorbance spectrum of the CNT-based UCPOF sensor increases linearly with a higher sensitivity of 0.68/vol% and magnitude change of 95.4% as compared to 0.19/vol% and 56.3%, respectively, for the GO-based sensor. The UCPOF coated with CNT exhibits faster response and recovery than that of GO. The sensor shows high selectivity to ethanol amongst a range of diluted organic VOCs. The superior sensing performance of the developed fiber sensor indicates its high efficiency for ethanol detection in various industrial applications.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Faculty of Science
DOI Number: https://doi.org/10.1364/OE.25.005509
Publisher: Optical Society of America
Keywords: Plastic optical fiber; Simple ethanol sensor; Un-cladded multimode plastic optical fiber; Ethanol liquid sensing
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 10 Mar 2020 03:58
Last Modified: 10 Mar 2020 03:58
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1364/OE.25.005509
URI: http://psasir.upm.edu.my/id/eprint/54568
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