Improving the performance of electrochemical sensors by means of synergy. Combinations of gold nanoparticles and phthalocyanines

  1. Rodríguez Méndez, María Luz 1
  2. Ruiz Carmuega, Ana Isabel 1
  3. Sastre Santos, Ángela 2
  4. Ortiz, Javier 2
  5. García Hernández, Celia 1
  6. García Cabezón, Ana Cristina 1
  1. 1 Universidad de Valladolid
    info

    Universidad de Valladolid

    Valladolid, España

    ROR https://ror.org/01fvbaw18

  2. 2 Universidad Miguel Hernández de Elche
    info

    Universidad Miguel Hernández de Elche

    Elche, España

    ROR https://ror.org/01azzms13

Revista:
Proceedings

Any de publicació: 2017

Volum: 1

Número: 4

Pàgines: 413

Tipus: Article

DOI: 10.3390/PROCEEDINGS1040413 GOOGLE SCHOLAR lock_openUVADOC editor

Resum

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.

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Ministerio de Economía y Empresa-FEDER (AGL2015-67482-R)

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