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Sensors 2017, 17(7), 1538; doi:10.3390/s17071538

Detection of Quinoline in G. boninense-Infected Plants Using Functionalized Multi-Walled Carbon Nanotubes: A Field Study

1
Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
2
Department of Science Laboratory Technology, Hussaini Adamu Federal Polytechnic, A2 Kazaure, Nigeria
3
Institute of Advanced Technology, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
4
La Trobe Institute for Molecular Science, La Trobe University, Victoria 3086, Australia
*
Authors to whom correspondence should be addressed.
Academic Editors: Paolo Scopece, Ligia Moretto and Paolo Ugo
Received: 25 April 2017 / Revised: 1 June 2017 / Accepted: 5 June 2017 / Published: 1 July 2017
(This article belongs to the Special Issue Advanced Sensors Based on Carbon Electrodes)
View Full-Text   |   Download PDF [2474 KB, uploaded 1 July 2017]   |  

Abstract

Carbon nanotubes (CNTs) reinforced with gold nanoparticles (AuNPs) and chitosan nanoparticles (CTSNPs) were anchored on a screen-printed electrode to fabricate a multi-walled structure for the detection of quinoline. The surface morphology of the nanocomposites and the modified electrode was examined by an ultra-high resolution field emission scanning electron microscope (FESEM), and Fourier-transform infrared (FT-IR) spectroscopy was used to confirm the presence of specific functional groups on the multi-walled carbon nanotubes MWCNTs. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were used to monitor the layer-by-layer assembly of ultra-thin films of nanocomposites on the surface of the electrode and other electrochemical characterizations. Under optimized conditions, the novel sensor displayed outstanding electrochemical reactivity towards the electro-oxidation of quinoline. The linear range was fixed between 0.0004 and 1.0 μM, with a limit of detection (LOD) of 3.75 nM. The fabricated electrode exhibited high stability with excellent sensitivity and selectivity, specifically attributable to the salient characteristics of AuNPs, CTSNPs, and MWCNTs and the synergistic inter-relationship between them. The newly developed electrode was tested in the field. The Ipa increased with an increase in the amount of quinoline solution added, and the peak potential deviated minimally, depicting the real capability of the newly fabricated electrode. View Full-Text
Keywords: electrochemical sensor; screen-printed carbon electrode; multi-walled carbon nanotubes; quinoline; Ganoderma boninense electrochemical sensor; screen-printed carbon electrode; multi-walled carbon nanotubes; quinoline; Ganoderma boninense
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Akanbi, F.S.; Yusof, N.A.; Abdullah, J.; Sulaiman, Y.; Hushiarian, R. Detection of Quinoline in G. boninense-Infected Plants Using Functionalized Multi-Walled Carbon Nanotubes: A Field Study. Sensors 2017, 17, 1538.

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