Next Article in Journal
Combining Electrochemical Sensors with Miniaturized Sample Preparation for Rapid Detection in Clinical Samples
Next Article in Special Issue
Application on Gold Nanoparticles-Dotted 4-Nitrophenylazo Graphene in a Label-Free Impedimetric Deoxynivalenol Immunosensor
Previous Article in Journal
Development and Characterization of a Diamond-Insulated Graphitic Multi Electrode Array Realized with Ion Beam Lithography
Previous Article in Special Issue
Rapid Detection of Chloramphenicol Residues in Aquatic Products Using Colloidal Gold Immunochromatographic Assay
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(1), 529-546; doi:10.3390/s150100529

A Fumonisins Immunosensor Based on Polyanilino-Carbon Nanotubes Doped with Palladium Telluride Quantum Dots

SensorLab, Department of Chemistry, University of the Western Cape, Robert Sobukwe Road, Bellville 7535, Cape Town, South Africa
*
Author to whom correspondence should be addressed.
Received: 17 October 2014 / Accepted: 22 December 2014 / Published: 30 December 2014
(This article belongs to the Special Issue Immunosensors 2014)
View Full-Text   |   Download PDF [813 KB, uploaded 30 December 2014]   |  

Abstract

An impedimetric immunosensor for fumonisins was developed based on poly(2,5-dimethoxyaniline)-multi-wall carbon nanotubes doped with palladium telluride quantum dots onto a glassy carbon surface. The composite was assembled by a layer-by-layer method to form a multilayer film of quantum dots (QDs) and poly(2,5-dimethoxyaniline)-multi-wall carbon nanotubes (PDMA-MWCNT). Preparation of the electrochemical immunosensor for fumonisins involved drop-coating of fumonisins antibody onto the composite modified glassy carbon electrode. The electrochemical impedance spectroscopy response of the FB1 immunosensor (GCE/PT-PDMA-MWCNT/anti-Fms-BSA) gave a linear range of 7 to 49 ng L−1 and the corresponding sensitivity and detection limits were 0.0162 kΩ L ng−1 and 0.46 pg L−1, respectively, hence the limit of detection of the GCE/PT-PDMA-MWCNT immunosensor for fumonisins in corn certified material was calculated to be 0.014 and 0.011 ppm for FB1, and FB2 and FB3, respectively. These results are lower than those obtained by ELISA, a provisional maximum tolerable daily intake (PMTDI) for fumonisins (the sum of FB1, FB2, and FB3) established by the Joint FAO/WHO expert committee on food additives and contaminants of 2 μg kg−1 and the maximum level recommended by the U.S. Food and Drug Administration (FDA) for protection of human consumption (2–4 mg L−1). View Full-Text
Keywords: anti-fumonisins antibody; impedimetric immunosensor; palladium telluride quantum dots; poly(2,5-dimethoxyaniline)-multi-wall carbon nanotubes; electrochemical impedance spectroscopy anti-fumonisins antibody; impedimetric immunosensor; palladium telluride quantum dots; poly(2,5-dimethoxyaniline)-multi-wall carbon nanotubes; electrochemical impedance spectroscopy
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).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Masikini, M.; Mailu, S.N.; Tsegaye, A.; Njomo, N.; Molapo, K.M.; Ikpo, C.O.; Sunday, C.E.; Rassie, C.; Wilson, L.; Baker, P.G.L.; Iwuoha, E.I. A Fumonisins Immunosensor Based on Polyanilino-Carbon Nanotubes Doped with Palladium Telluride Quantum Dots. Sensors 2015, 15, 529-546.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top