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Proceedings 2017, 1(4), 413; doi:10.3390/proceedings1040413

Improving the Performance of Electrochemical Sensors by Means of Synergy. Combinations of Gold Nanoparticles and Phthalocyanines

1
Group UVASENS, Universidad de Valladolid, 47011 Valladolid, Spain
2
Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández de Elche, 03202 Elx Alacant, Spain
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 22 August 2017
Download PDF [355 KB, uploaded 22 August 2017]

Abstract

Voltammetric sensors chemically modified with combinations of two electrocatalytic materials: tetraoctylammonium bromide capped gold nanoparticles (AuNPNBr) and a sulphur containing zinc phthalocyanine derivative (ZnPcRS) are reported. The electrocatalytic effects in the detection of catechol have been analyzed in sensors obtained by direct mixing (AuNPNBr/ZnPcRS) and in sensors modified with an adduct where both components are linked covalently (AuNPNBr-S-ZnPcR). Results demonstrate that the nature of the interaction between both components modifies the electrocatalytic properties. The AuNPNBr/ZnPcRS mixture improves the electron transfer rate of the catechol reduction, with limits of detection of 10−6 M. The covalent adduct AuNPNBr-S-ZnPcR enhances the response rate of the oxidation of the catechol with limits of detection of 10−7 M.
Keywords: electrochemical sensor; phthalocyanine; gold nanoparticle; catechol electrochemical sensor; phthalocyanine; gold nanoparticle; catechol
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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Rodriguez-Mendez, M.L.; Ruiz-Carmuega, A.I.; Sastre, A.; Ortiz, J.; Garcia-Hernandez, C.; Garcia-Cabezon, C. Improving the Performance of Electrochemical Sensors by Means of Synergy. Combinations of Gold Nanoparticles and Phthalocyanines. Proceedings 2017, 1, 413.

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