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Nanostructured chitosan/maghemite composites thin film for potential optical detection of mercury ion by surface plasmon resonance investigation


Citation

Muhamad Fauzi, Nurul Illya and Yap, Wing Fen and Sheh Omar, Nur Alia and Saleviter, Silvan and Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim and Hashim, Hazwani Suhaila and Mohd Nasrullah (2020) Nanostructured chitosan/maghemite composites thin film for potential optical detection of mercury ion by surface plasmon resonance investigation. Polymers, 12 (7). pp. 1-13. ISSN 2073-4360

Abstract

In this study, synthesis and characterization of chitosan/maghemite (Cs/Fe2O3) composites thin film has been described. Its properties were characterized using Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) and ultraviolet-visible spectroscopy (UV-Vis). FTIR confirmed the existence of Fe–O bond, C–N bond, C–C bond, C–O bond, O=C=O bond and O–H bond in Cs/Fe2O3 thin film. The surface morphology of the thin film indicated the relatively smooth and homogenous thin film, and also confirmed the interaction of Fe2O3 with the chitosan. Next, the UV-Vis result showed high absorbance value with an optical band gap of 4.013 eV. The incorporation of this Cs/Fe2O3 thin film with an optical-based method, i.e., surface plasmon resonance spectroscopy showed positive response where mercury ion (Hg2+) can be detected down to 0.01 ppm (49.9 nM). These results validate the potential of Cs/Fe2O3 thin film for optical sensing applications in Hg2+ detection.


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Official URL or Download Paper: https://www.mdpi.com/2073-4360/12/7/1497

Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.3390/polym12071497
Publisher: Multidisciplinary Digital Publishing Institute
Keywords: Chitosan; Maghemite; Optical; Mercury ion; Surface plasmon resonance
Depositing User: Mohamad Jefri Mohamed Fauzi
Date Deposited: 30 Dec 2021 07:28
Last Modified: 30 Dec 2021 07:28
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/polym12071497
URI: http://psasir.upm.edu.my/id/eprint/86880
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