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Article

Nanostructured Chitosan/Maghemite Composites Thin Film for Potential Optical Detection of Mercury Ion by Surface Plasmon Resonance Investigation

1
Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
2
Functional Devices Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
3
Faculty of Civil Engineering Technology, Universiti Malaysia Pahang (UMP), Gambang 26300, Kuantan, Pahang, Malaysia
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(7), 1497; https://doi.org/10.3390/polym12071497
Received: 26 May 2020 / Revised: 11 June 2020 / Accepted: 12 June 2020 / Published: 4 July 2020
(This article belongs to the Special Issue Functional Chitosan-Based Composites)
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. View Full-Text
Keywords: chitosan; maghemite; optical; mercury ion; surface plasmon resonance chitosan; maghemite; optical; mercury ion; surface plasmon resonance
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MDPI and ACS Style

Fauzi, N.I.M.; Fen, Y.W.; Omar, N.A.S.; Saleviter, S.; Daniyal, W.M.E.M.M.; Hashim, H.S.; Nasrullah, M. Nanostructured Chitosan/Maghemite Composites Thin Film for Potential Optical Detection of Mercury Ion by Surface Plasmon Resonance Investigation. Polymers 2020, 12, 1497. https://doi.org/10.3390/polym12071497

AMA Style

Fauzi NIM, Fen YW, Omar NAS, Saleviter S, Daniyal WMEMM, Hashim HS, Nasrullah M. Nanostructured Chitosan/Maghemite Composites Thin Film for Potential Optical Detection of Mercury Ion by Surface Plasmon Resonance Investigation. Polymers. 2020; 12(7):1497. https://doi.org/10.3390/polym12071497

Chicago/Turabian Style

Fauzi, Nurul I.M.; Fen, Yap W.; Omar, Nur A.S.; Saleviter, Silvan; Daniyal, Wan M.E.M.M.; Hashim, Hazwani S.; Nasrullah, Mohd. 2020. "Nanostructured Chitosan/Maghemite Composites Thin Film for Potential Optical Detection of Mercury Ion by Surface Plasmon Resonance Investigation" Polymers 12, no. 7: 1497. https://doi.org/10.3390/polym12071497

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