Improving the performance of electrochemical sensors by means of synergy. Combinations of gold nanoparticles and phthalocyanines
- Rodríguez Méndez, María Luz 1
- Ruiz Carmuega, Ana Isabel 1
- Sastre Santos, Ángela 2
- Ortiz, Javier 2
- García Hernández, Celia 1
- García Cabezón, Ana Cristina 1
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1
Universidad de Valladolid
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2
Universidad Miguel Hernández de Elche
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Datum der Publikation: 2017
Ausgabe: 1
Nummer: 4
Seiten: 413
Art: Artikel
Zusammenfassung
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.
Informationen zur Finanzierung
Ministerio de Economía y Empresa-FEDER (AGL2015-67482-R)Geldgeber
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Ministerio de Economía y Empresa
Spain
- AGL2015-67482-R
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Junta de Castilla y León
Spain
- grant BOCYL-D-4112015-9
- VA-032U13
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FEDER
European Union
- AGL2015-67482-R
- VA-032U13